Hello fandom, I am a fan who greatly prefers the PHM movie over the book, and I am here to explain why and validate everyone else who feels the same.
Highly subjective rant incoming. Listen. Listen.
PHM's movie works because it's not the book. It's better than the book. It's like that one fix-it fic in the fandom that everyone likes better than canon but people don't want to admit it because they're afraid it will make them look superficial or lame or not smart or whatever, so they have to pay lip service to the original or else they're bad fans who care more about feelings than facts. Fuck that shit.
Babes, the movie is better, and you're right to say it. You can still like the book or you can not like the book. I don't like the book very much. I've skimmed the book. I would not have watched the movie if I had read the book first. I would not have been nearly as delighted by the movie if I'd read the book first. It's subjective but you're allowed to be subjective. You will not lose fan credentials if you don't like the book or prefer the movie to the book.
I saw a post today that described the book as the rough draft and the movie is the finished product and it makes perfect sense. Andy Weir is a brilliant scientific and technical writer but his imagination has limits. Everything is fantastical but also cripplingly utilitarian, and if you like that, it's fine. Shit's subjective. But I can see why the directors actually gave Grace a nice, livable home on Erid with a beach and a house and a tree and an ocean and not a box for the one of the literal two saviors of their planet.
James Ortiz came up with more Eridian culture and lore in five minutes than Andy Weir came up with in years. It shouldn't have taken the puppeteer to point out that Rocky kind of blowing off his relationship to Adrian in the book was cold and awful and that Rocky likely needed something to keep him from throwing himself out of the airlock twenty earth years into his solitude. It shouldn't have taken the puppeteer to describe Eridian social dynamics and to give Rocky some actual backstory and to point out that hey, bro's heckin' traumatized. But it did. I saw someone making a point about how we shouldn't consider Ortiz's headcanons as actual canon, and boy did that rub me the wrong way, because listen. My guys, he is the reason movie Rocky has a character and is so beloved, and it's his backstory insights that defined how he played him. They are canon.
The directors told Andy Weir that the coma gene sucked and they were right. I'm glad Rocky's not wearing anything but utilitarian work garments for holding tools because the directors and writers were probably like me and wondered why literal rock crab spiders had to be fully dressed at all times. They gave Ryland Grace and Eva Stratt actual emotional depth and complexity. I assure you that Eva Stratt showing an emotion and an actual interest and connection with the world does not make her portrayal any less feminist or powerful. In fact, it's probably more feminist that they took out Eva Stratt's objection to Ilyukhina's presence and Grace's white knight moment.
They gave emotional moments actual heft and weight. They let Grace and Rocky actually emote about things. They had Grace have an emotion depth deeper than a puddle. They give him an actual honest-to-god emotional reaction to being told he's going to live that's not him just bursting into tears, because while I know we love a man who's a wet cat, Andy Weir used him bursting into tears as a substitute for actually properly describing how he feels. They accomplish actual emotions while keeping Grace a wet cat. They gave Rocky a suit that only exists for the sole purpose of being able to interact with Grace better. They make Grace choose to go back for Rocky. Not for Erid. For Rocky.
They do not hug in the book. I cannot emphasize this enough. They do not hug in the book. It took the movie to get them to hug. It took the movie to decide that maybe Erid treats Grace with more than basic kindness and a well-lit house surrounded by darkness. That Rocky would interact with him beyond saying hi through a window.
The book does have a lot of fun details, but if you were watching the movie without any knowledge of the book, you don't need them. You don't need Steve Hatch or Dmitri or Bob or Marissa. You don't need Eva Stratt nuking Antarctica. You don't need the coma gene. You don't need the plagiarism trial. You didn't need Grace somehow supermaning Rocky back into his airlock or cleaning out his vents. You did not need the Beetle Arc after Adrian. The fact that you can watch the movie by itself and not realize that any of these things are missing is an indictment about Andy Weir's writing as well as how good the movie adaptation is itself.
I saw the book being described in an add on an Adam Savage video as a movie 'tie-in', which made me laugh, but it's also true. The book reads more as a tie-in to the movie than anything else now. The movie has ascended it. The movie is better. The directors saw the amazing scaffolding and detail and realized that, unlike The Maritian, this does not read best as a story of survival and human ingenuity. It reads best as a love story. It reads best as a love story that encompasses themes of selflessness versus selfishness, of the fine line between bravery and cowardice, about loneliness, of autonomy and choice, of finding home in the most unexpected places, and about connection with the world around you. I could make a two hour video essay about these themes. There is no way this movie doesn't win Best Picture next spring.
Andy Weir did not have the capacity to come to that conclusion in his own writing. The movie's creative team did. Whether you like it or not, Project Hail Mary is a love story, romantic or platonic or otherwise. It only works if it is.
Rocky makes Grace a beach, a house, a tree, and an ocean out of love. Yet Grace doesn't need any of that. Only him. Movie Grace goes back for Rocky. He does not mention the fate of Erid. He would go back for Rocky and Rocky alone. He does not cry over the revelation that he will die in space for him. He shrugs at the camera like 'whelp, guess I can't go back to Earth, mea culpa'. He doesn't hesitate. Love makes him brave. Grace doesn't want to go back home because he already is home. His head was in the clouds. His head was with Rocky this whole time.
I would take that over me-burgers any day of the week.