The Dickbabs fandom has buried themselves in hypocrisy and blind spots. Two of the most common reasons they mention NightStar "doesn't work" is because Starfire is too powerful and would outshine Dick in his own runs. Followed by the trusty old "she wouldn't be happy in Bludhaven/earth".
On the first one, I don't even have to dive too deep on why this one is (excuse my language) utter bullshit coming from them. It fascinates me how they will dig deep for the excuses, yet justify writers pulling every feat imaginable out of their asses, Mary Suifying Babs in the process, even to the point that she out performs and even outshines Dick in his own damn runs. Worst part is we cannot escape it. Every other panel is Babs being smarter, more capable, and (at times) even a better fighter than Dick. But apparently, Barbara Gordon doing this is peak girl power, a middle finger to the non existent DC writers who find any reason to keep Babs away from Dick (I have seriously seen this BS a few times), and shows Dick finally has the "equal" he's been missing all along. Finally, someone is on his level!
As for the second reason, Starfire is on earth, has pretty much stayed on earth for years, and seems to be doing just fine. If you lot think it's okay for Babs to have a weirdly codependent relationship with Dick, lock herself up in his apartment all day with no job, no hobbies, no friends, no nothing besides revolving her entire life around him to the point her entire identity relies on him, then I don't see why you'd think there's anything wrong with Starfire managing a life in Bludhaven. If those diabolical levels of thirsty characterizations are alright with you, I think you can manage understanding Starfire would cope well in Bludhaven. Besides, I don't think there is a single Starfire fan that would want her holed away in his apartment all day anyway. Most of us would much rather see a healthy hero couple with their own lives and identities. š