[nimnio]

From a certain perspective, you just paraphrased the quote you disagreed with:

Him: "If the reviewer makes a suggestion, and I don't have a clear answer as to why the suggestion should not be implemented, I'll usually make the change."

You: "[Do] not act as a blocker for code reviews unless it's absolutely necessary."

I think these express essentially the same philosophy, with some slight differences in the particulars.