The most extreme example of cheating is sports theater, and even that has a fandom in the form of WWF.
So why not let the sports police themselves, and let the market decide whether they are doing a good job with their attention?
I don't care about sports, so I am asking from a naive position, but I from this position I can't fathom caring more about the sport than the people who compulsively wager on them, and destroy their lives.
This isn't just a gambling problem, having your team tank to get top draft picks also sucks. But if you enjoy the sport, you probably enjoy it in a "may the best player/team win" way.
It sucks to realize your team lost because the other team cheated, and it sucks to realize your team lost because somebody threw. If I wanted to watch scripted drama, I would put on succession. Or wwf.