Interesting. Speaking as a former theater kid, what Glee did in my mind was make "the theater kid" go mainstream. Anyone who was into their high school drama scene is familiar with the earnestness, the live-your-truthiness, the immaturity, the pettiness, the melodrama, and the rampant Main Character Syndrome that permeated that show and its fandom. This stuff has always been there, but Glee made it cool rather than faggy.
Student Theater Showcase, a recurring sketch on SNL, works in large part because you get the sense that the performers are drawing on lived experience as annoying theater kids:
https://youtube.com/watch?v=HPAtpAelwe4
While I think Glee was extremely influential, there was a lot of proto-wokeness in the early 2010s, pretty much all of it coming from a good place; Dan Savage's It Gets Better project comes to mind. But yes, it's certainly true that a lot of "wokeisms" worst excesses are the result of the theater kid mindset running unchecked.