I mean i understand some matches may be fixed but when two popular players fight would any of them want to be the loser ? And the damage looks very real or is the only fixed thing the outcome ? Maybe someone from the industrty can answer . Or am i missing something if so put it into the comments and i'll edit the post.
It's like live action stunts the stories and theatre is scripted the broad strokes of the match are choreographed with the finer details worked out between the wrestlers and the ref. But you can't fake some of the bumps esp if you were someone like Mick Foeley
Edit: This randomly popped up might be a fun insight