Think about it; instead of those in charge or the instances deciding who they don’t want to be federated with and thus restricting content for the users, it would be better if users were able to block entire instances instead.
We’d be able to curate our own browsing experience so much better without admin/mod drama influencing the rest of us.
Edit: Alright so maybe not exactly replace defederation, but it should still be an option available to us, and in general should become the default action before defederation IMHO.
Using an app with account switching helps and isn’t that difficult. Also I think you fundamentally don’t understand the fediverse and maybe should find an alternative if you’re unwilling to make your own instance. There’s plenty of fixes for your issues and signing up and trying out different instances isn’t difficult. I also find it a little bit suspicious to post this to a more heavily moderated fine tuned instance as well and seems borderline like you’re stirring the pot to cause drama because we specifically fly in the face of what you’re after here.