Yeah, I feel you. Except for special circumstances I actually prefer not to block people so they can't stealth-disagree with me without me getting a chance to yell back at them in turn.
Personally, my feeling is that it's also actually better not to shut out the triad instances. That's actually what they want. That is the entire reason and rationale why they block so aggressively, that they want to create a little bubble where no one calls them out on stuff. Shunning them just helps them do that. It's actually gotten worse in the time I've been around on Lemmy, I think, and I think it is from people turning them off at least as much as it is from their own blocks from their side. At present, they will sometimes come out and say stuff that is just total nonsense that is in line with the hivemind and then seem to be genuinely surprised if someone reacts negatively to it. And, they think that anything not in the triad is "the lib instances" and seem to think that it's a minority category or something, and again seem sincerely surprised sometimes if some indication emerges that it's not popular. I don't think that used to happen, I think they used to have an awareness of where the dividing-lines of different echo chambers were even if they and I would disagree about which one is "right."
None of this is to say you shouldn't block them or find a fully defederated place of course. Just giving my thoughts on it.