The Rebellion didn’t treat Luke that way. They didn’t hinge all their hopes on whether or not he showed up to help. Despite his abilities, he was still just one man, and one small part of a larger faction. The fact that the Resistance is so hyper focused on recruiting someone who, as far as they know, abandoned their cause years ago, and is hopeful that he’ll return, is naive and reflects poorly on them.
He’s still just one man, regardless of his powers, and it takes a long time to train a new generation of Jedi, so that’s hardly an immediate concern for the First Order. The line in TLJ when Rey tells Luke he needs to “bring the Jedi back” to stop Kylo Ren is really odd, since it makes it seem like Luke can just flip a switch and restore the Jedi after years of sitting around.
It’s also odd that Snoke is more focused on finding Luke than he is on destroying the Republic. His priorities seem backwards. He and the First Order have much bigger fish to fry than an inactive Luke who might be a potential threat in the future, yet Snoke talks about finding Luke like it’s the most important step in winning the war. But if the Republic and Resistance were destroyed, Luke coming out of hiding would be a nuisance, at best.
After accomplishing the feat of destroying the the Death Star, you don’t see Luke being treated with any sort of reverence in TESB. He’s still just a squad pilot among many, and his mastery of the Force is merely a personal journey. Absolutely nobody amongst the Rebellion shows the slightest concern with reviving the Jedi Order, because the conflict between the Jedi and the Sith was one of many narratives in the OT.
This is echoed in the PT, where the Jedi Order have grown to overestimate their role in the Galaxy, as Luke points out in TLJ, so much so that when the Jedi Order is dismantled nobody cares.
The ST contradicts this by turning the Jedi Order into a vital component of galactic society. Max Von Sydow’s character says that without the Jedi there can be no balance. There’s this bizarre belief that Luke must be brought back into the fold and Snoke worrying about the potential return of the Jedi Order strikes me as paranoid and a little psychotic.
Wholeheartedly agreed, which is why the ST functions better as a meta-level sequel to the Star Wars trilogy, so to speak. Rian plays with Abrams’ concept of Luke being a legend - something that he’d never be in-universe - because he’s a legend to us, the audience, and shows that even our heroes are people that fail. And Rian did that just right - what is the only reasonable explanation for Luke to be in that situation? To believe that isolating himself from the Force is the correct thing, and he does that expertly by playing in the whole point of the PT which is that the Jedi were a harmful institution by that point, which leads Luke to believe that such darkness is at the heart of the Jedi religion.
People seem to think that’s the point of the movie - but it’s not, it’s that no matter who you’re meant to be or what you’re told to be or what you think your institutions are, you’ll always be a hero and a legend to someone if you do the right thing. On top of everything it also functions as a direct sequel to TFA because it questions but reassures the importance of the structures that movie so desperately builds up and just mindlessly loves.