A bridge is a tool for connecting things don’t connect, it is not federation.

The relay layer/app view forces you under the control of a centralized, the only thing meaningful about that kind of federation is hosting costs for processing and storing post data are offloaded onto the user.

Which when you think about it is actually pretty fucking insulting to the fediverse and what is trying to be when bluesky pretends it is aiming for federation and decentralization.