Conventionally speed running communities define their own categories. So as long as there's some way people can agree for how to compete things work out OK. You'll see that for example several important speed running games have "No major exploits" in a category rule - who decides what's a "Major exploit" ? The other runners, duh.

At a GDQ it's fun to watch some awful exploit "win" Mario in eight seconds (not a real example) by messing with a game bug and precise input, but it's also fun to watch somebody who is incredibly good beat it the way you'd imagine you could if you were much better at the game, so there's room for multiple categories in popular games.

If there's a split it can often be resolved by having two categories. If you think it's stupid to hope to get a good seed in Minecraft, you can just only run the chosen seed categories, meanwhile if you think that sucks because it doesn't reward agile thinking you might prefer the random only categories. Both groups get to have fun.