I'm not sure that the organizers actually provided the security. I think just as easily the state could have intervened and said if you want to have a rally this is who you're going to have to use as security.
this is the reason why anti-authoritarians don't ask for permits. not registering an official head of the movement means that you don't have to become legible to the state. it's also a form of harm reduction because the state always expects the problem to go away if the leader is arrested, but in anarchist circles a new head of the hydra just pops out to replace it
you sound no different from the incel frat guy you'd never want to leave your drink uncovered around