However, it can be said also that fragmentation is a feature too. It may not make sense for small communities with a small user base already. The point is that for communities like gaming, there would be multiple big gaming communities over time.

This is Lemmy, not Reddit and it being decentralized means that it gives people choice. If you don’t like the rules or how a certain community is being run, there are other ones to go too and there is not one “right” option.

While Reddit was built for centralization, Lemmy was not. It was built for federation. By calling it a “bug”, you are missing a huge portion of the reason it is that way, since it is working as intended, but I hope this comment makes you understand it better