Federation isn’t dependent on everyone being corralled together within a few of the largest instances anyway
This is why I still don't believe that the fediverse is the right place for a site like Reddit. The advantage of Reddit, for better or for worse, was that an interest had its own community and everyone could gather in that community. But within the fediverse it would seem that gathering everyone into a single community for that interest would require centralising into a few instances.
Like I said, Beehaw feels more like an old forum than it does Reddit, and I think that is a good thing. My initial concerns came from the promotion of Lemmy as a replacement for Reddit, but I think the fact that I joined Beehaw instead of any other instance means that that's not what I actually wanted. But I still think this is an important conversation to have, especially as we find our footing as a community.
I think my main concern now is about more niche communities that might not exist within Beehaw, and how defederation with their instances will affect the communities around those interests.
I do think for the most part that the sorts of people that these actions would deter are probably not the sorts of people that would fit within this community. But also people may hear about it and not give the community a chance.
For me there are interests that are judged harshly, and I like having places where I could talk about those interests without judgement from those outside it. Not that I particularly care about what others think, but for instance I like professional wrestling, and I like being able to talk about wrestling with fellow fans without being bombarded by the "you know it's fake" crowd. If Beehaw isn't that place then it isn't that place, but the one thing I liked about Reddit was the ability to connect with multiple communities from a single account. And while that's theoretically possible with Lemmy, it only is so long as those communities are accessible from the same instance.