As for leaving comments without blocking I do not mean it is always or even commonly toxic but that I've seen instances where it could be argued to be so or potentially unhelpful.
I think the misunderstanding might be when you or your team leave comments without blocking are you going to sign off after they are addressed or are you leaving them on a review you ultimately don't feel comfortable signing off on even if they're addressed?
How often does someone leave comments on a review they would never feel comfortable signing off on either way because they don't know the area? I think I'm in agreement with you - leaving comments without blocking and signing off after they're addressed or if someone else signs off and mine aren't addressed that's fine. I'd block the review if it was something I was that concerned with.