In some of the highest tier bodybuilding competitions, some people will be using steroids, and because that went unchecked and unspoken, now everyone has to or else they have no chance of competing. If you want to compete and you aren't using steroids, you will lose, so you have to start using them too.

In the game Warzone right now, at least some of the high-tier players are using hacks in competition or at least to get their "High kill game" viral videos on YouTube. So if you want to compete in that space, say make an even more impressive "high kill" game and take that crown, you have to start using hacks too.

The money on the line is bonkers too, as well as the ad-revenue from popular YouTube videos, you've got real competitions dropping 300k on online comps where it's incredibly easy to get away with cheating, so of course people will do it. Because some people do it, others will have to as well, and it goes unspoken because of all the money and prestige involved.

Because it's advantageous for the competitions holders themselves to be hosting the highest level of competition for the sport, if Warzone comps or these bodybuilding competitions had to admit that all their most popular and highest performing participants were frauds, it would be incredibly embarrassing (and unprofitable) for everyone, and so it stays unspoken.