This is exactly the problem I've had with Twitter as a social platform. The network is simply too big to the point that it's strange to me that the default means of posting is to literally everyone using the platform. Smaller discord communities I've been in rarely get into flame wars as often as people on Twitter since they tend to already be a self-selected group of like-minded people. Putting people with wildly different views in front of each other and incentivizing "hot takes" via like and retweet counters is very much the opposite of a healthy social environment.

This analogy in part breaks down because in the digital space, such "bans" don't require any substance.

If in the physical space you'd ban somebody from ever joining your meeting or neighborhood again, you need to have some type of probable cause. Something really bad must have happened.

Meanwhile in the digital space: banned for life because your comment was too long. Don't believe me? Watch:

https://lemmy.ml/modlog

If people aren't happy with how their instance's admin behaves (e.g. "banning" users or removing ties to a particular server), they'll leave the instance. There is no single entity that's in control anymore.