In Project Hail Mary, Stratt suspects that she is going to jail for what she needed to do.
I think she's intentionally deluding herself to make herself feel better there.
Just because they have a cure for the Astrophage, does not mean that things magically get better.
She still nuked the arctic, covered the Sahara in solar panels and set a man to his death. But the emergency won't be over in her lifetime.
She did all those things to preserve Earth's heat in the face of a dying star, but if the Taumeba are deployed and they work, then suddenly the balance switches the other way. The same global warming that would help stave off extinction will kill them unless somebody does more horrific and extreme things. Food is rationed and people starve to ensure the engineers and workers building the solar shade are fed. Australia is strip-mined. At least the astrophage and the Sahara solar array means they have enough energy now.
The climate is a delicate balancing act. Each swing makes it harder to correct.
Stratt is the person who saved the world and the only one who can continue to do so.
There are no resources to rescue Grace until the Earth is safe. She just has to do the work. Forever.









