@fram: Before I say this, yes WWE is the biggest problem in that ideal since they are the largest and most important wrestling company that should be better at dealing injuries.
But every other company smaller company is bad. The whole industry is bad at it. The whole idea from the smallest indie company to the biggest of companies has wrestlers thinking that they have to finish matches no matter what and that you always have to make the next town. Mostly because wrestling has never found to get past the TOUGH PERSON mentality and the concept of LOSING YOU SPOT.
CM Punk has his own example of finishing a match with a broken skull and then basically sleeping in a basement for a month.
The idea of a union pops up every so often, but I'm even sure how deep into the industry that would cover people. And basically if you wanted that to happen right now you would need John Cena to come out and make a big statement that he would never make.
Randomly popped in to this thread, not a big wrestling fan, but just wanted to offer that this is a lot like pro hockey players. They're famous for stupidly playing through injuries to their detriment.
I kind of get it in the final round of the playoffs where Patrice Bergeron played through a broken rib, torn cartilage and muscles, and a separated shoulder, but the belief that you have to play through everything or someone will take your spot is a real problem in the NHL. It's really bought concussions to the front of people's minds, as players will pretend they're fine when they're obviously not.