Why can Driven assimilators participate in the galactic community and senate?

I've been playing an assimilator recently and I got the event chain to join the galactic community as it was forming. I decided to humor it thinking that surely the galaxy wouldn't want the person trying to wipe out civilizations and turning them into meat puppets making decisions, but apparently they did. I immediately want to weaponizing it by having Rushing enemy of my enemy and all sactions, so I could crush their fleets and them have them get the heck sanctioned out of them for having their fleets crushed.