The whole instances thing is flawed. It’s mostly a copy of the walled garden system of corporate big social, including the capacity to install shitty power hungry leaders and the lack of user-centric freedom and control. Hopefully we get a more hybridised system down the line.
This is one of the biggest issues I have with Mastodon. It’s not even necessary to have users tethered to instances, that wasn’t the explicit intention by the authors of AP. Users should have more autonomy without the need to self host