Do we have that? It seems that we more have people confused about why a remark was downvoted and wanting to understand the logic.

That scenario has less potential for conflict, but it still creates a social obligation for me to do work that I didn't mean to volunteer for.

It's a pretty weak obligation, though-- people only tend to ask about the reasons if they're getting a lot of downvotes, so you can probably leave answering to someone else.