The best Spider-man movie to date features Peter losing his powers and giving up on being Spidey entirely. The (debatably) best Superman movie also features him losing his powers. I don’t see your point.
Yes, and he discovers he makes a mistake and get’s his powers back. That’s not the same as permanently altering a character.
Isn’t that what Luke does though? Even though he failed, he decides to become the legend one last time (and that may be my favorite scene in movie history). So he, in a way, got his power back, meaning the change wasn’t permanent.