I think the answer here unfortunately relates to power dynamics. I'm senior, and others believe I'm senior, so when I dismiss reviews like this, no one fights me. Sometimes, with folks like this, even without being senior, just standing up to them works.

As others have said, using linters, auto-formatters, etc often helps with this as a lot of the things these people like to nitpick are then standards enforced by code, and you can send them off to fight people about the standard ("but not in this PR").