It's not a problem of federation, it's a problem with ActivityPub or at least the networks built on it. The current system is echo-chambery in nature because your instance owner does not only control your own speech being hosted there, but also who you're allowed to read from your feed and who you're allowed to talk to.
It may be intentional, it may be due to a byproduct of how the federation details are implemented, but regardless of how it came to be the end result is an undesirable protocol for discourse and as far as I'm concerned, not worth the effort compared to just switching to scraping Reddit until a worthwhile federated social network appears.
It may be intentional, it may be due to a byproduct of how the federation details are implemented, but regardless of how it came to be the end result is an undesirable protocol for discourse and as far as I'm concerned, not worth the effort compared to just switching to scraping Reddit until a worthwhile federated social network appears.