If I had to make a wild guess, I'd say someone thinks if you post something, then of course you agree with it. Who can't imagine getting anything out of something they disagree with. That thinks nuance is probably a brand of women's perfume. Who frightens easily and uses downvotes as protection from things that might confuse them. You know, someone that votes based on whether they agree with something, instead of what it does in the conversation. Who could never even imagine voting up something they disagreed with.