I completely agree with you, but as long as there's have a down arrow button, there are going to be a lot of people who use it for disagreement — especially when the up arrow button is used for agreement. To my knowledge, it's not as much of a thing among kbin.social users (likely since votes are public), but it's definitely there, and I imagine poor downvote use will only become more prominent as the instance grows. Thus, it'd be really bad for some people to use and interpret downvotes as a pseudo-report button, as not everyone will use it that way.