While that's true, fediverse mods and admins are MUCH faster and more diligent about clamping down on this stuff.
Even though we can't all be around at all times, the ones that are instantly start freezing out the offender on the community and instance level.
It really doesn't take long for walls to come up around problem users.
And if the user escalates... well.
I'm particularly thankful for the way the fediverse seems to have collectively agreed that the second you wish death upon someone, you're just out. It's not up for discussion at that point. No slaps on the wrist, none of the admins want to host that stuff, so the moment a report reaches them, that user(name) is simply gone.