I very much agree with giving source instances a chance to discipline/ban bad actors. Hopefully this will evolve in that direction. For now the Beehaw admins feel that the right mod tools are not yet available. They have a specific vision for what they want to build, and it is completely up to them how they go about that.
That doesn’t mean everyone external has to agree or like their decisions, but it’s their house, their rules.
Several of the politically conservative subs would do that to redditors who commented in other subs with opposing ideologies. You didn’t even have to comment in the conservative subs to get a ban.
And as petty as I think that is, I still think it is their right to run an unchallenged echo chamber with completely homogeneous opinions. Similarly Lemmy instances are free to federate or defederate as they see fit.
So one can tell you that the other is costing you too much.