You're ignoring that for the majority of its history both the pro-wrestling industry and fans have supported the kayfabe, so people saying "It's fake" would be met with "No it's not! Was that guy getting hit with a chair fake?!?!!"

Does that happen in porn? In soap operas?

And, of course, a lot of the fans of pro-wrestling were children. The "It's fake! No it isn't!" arguments mostly happened between eight year olds in various stages of figuring out the world lies to them.

Even beyond that, this is just a ridiculous boomer argument on the whole. The kayfabe has been largely abandoned for a decade, because it was becoming a legal liability to pretend to be a legitimate athletic contest no matter how hard they winked.