Boxing and football probably won’t survive, but I have a feeling pro wrestling will be okay if they manage their talent okay.
I see pro wrestling much more as an opt-in-by-adults kind of activity, sort of like ski-ing or parkour or other action/extreme sports. There is danger, but those going in know the danger, and they chose to do it of their own free will, not because it’s the only way to get educated, or a route out of poverty.
It also has the benefit that winning or losing isn’t strictly correlated to physical effort in relation to the opponent. In football the players punish their opponents, and put themselves through the same punishment, as that’s the only way to get an advantage and win. With pro wrestling, the outcome is decided in advance and the physical exertion is in cooperation with the opponent. Being more violent isn’t in the interests of anyone involved.
Of course, like base jumping and wingsuit flying, there is competition among participants to be ever more extreme in their stunts for their videos and other sponsorship related events. But pro wrestling isn’t an independent or solo activity, so there are avenues for regulation or control that aren’t there for jumping off low buildings or flying close to rock formations.
Still looks pretty brutal at times though.