Just to clarify, my proposal is that the downvote would only be counted if the person selected a reason. When I said “without requiring every downvoter to provide an explanation,” I meant without requiring every one of them to type out their own explanation (since they can rely on the defaults or on what a previous person has written).
Ahh, now I get you! Yeah, that sounds like a good idea!
Like I’ve mentioned in another reply, I wouldn’t require the same from upvotes because they may imply the lack of counterarguments, while a downvote implies a recognition that there is a problem, in which case it’d only be fair to state which one it is.