You have to ban things that are outright bad for athletes. You also have to remember, given a competition people will do whatever it takes to win, because someone else will. So you have to draw the line somewhere.
Also there's the pesky little problem of poor or up and coming athletes literally killing themselves to try to win big money, all for the benefit of some FIFA-alike and its sponsors.
Not when the opponent pulls out a surface to air missile.
You're assuming all those things are bad for the athletes.