Comment by chowells

Fighting games do not use server-mediated simulation, in general. Cheating is actually a huge problem in popular games. And in fact, even running a server-mediated simulation wouldn't help with any of the common cheating in fighting games.

For instance, a common cheat in Street Fighter 6 is to trigger a drive impact in response to the startup of a move that is unsafe to a drive impact. That is recognizing the opponent's animation and triggering an input. There's no part of that which cares where the game simulation is being done. In fact, this kind of cheating can only be detected statistically. And the cheats have tools to combat that by adding random triggering chances and delays. It's pretty easy to tune a cheat to be approximately as effective as a high-level player.

Kernel-level anticheat isn't a perfect solution, but there are people asking for it. It would make cheating a lot harder, at least.