The main point of federation for me is access to more content without it being run by large corporations. If an instance gets taken over by a toxic group that is bot spamming advertisements or such I can move to another instance and the community lives on without having to find a whole new platform.

Seems pretty simple. If you want to be able to see the content on an instance that everyone else has defederated from, create an account on that instance as well. Apps allow for pretty seamless usage of multiple accounts. That’s the easy alternative to the constant “make your own instance and run it yourself response”

I believe lemmy.world and lemmy.ml have porn blocked for their instances because I never see any. Those complaining about to much porn or no porn likely just need to check out a different instance.