Not really. Most instances I’ve seen aren’t federated with them. I had to go out of my way to find an instance that was because I don’t want defederation to be the first tool now that instance blocking exists on a user level. I also didn’t want the biased and trigger-happy mods of Lemmy.ml who seem to ban users and delete comments at a moment’s notice. Notably, the biggest instance, lemmy.world, is not federated with them, and so for most first-time users who go there it does make Lemmy a less hostile place.