Looks like someone really kicked the hornet's nest recently on mastodon by announcing (not even deploying) a Mastodon-BlueSky bridge. Just take a look at the github comments here to get an idea of how this was received. Plenty of people way more experienced than myself have weighted on this issue so I don't feel the [...]
Which is why everyone gets the option to subscribe to exactly what they want to see and block users on top of that. The ability to actively choose an echo chamber is not a good solution.