Why not have a meta discussion like a Wikipedia Talk page so comments like these would have room and critique won't be shut down.

Yesterday (you can look in my comment history) I ran into a situation where the person doing the down-voting turned out to be basing it on their opinion not fact (after they finally stated their opinion on the matter, which contradicts peer-reviewed research on the topic, I realized why they were down voting: insufficient depth of understanding of the topic) and no one came after them to correct the situation...

Either have people explain why they down-voted or have a Talk page where people can discuss their reasons, complain, etc, behind the scene.