The platform has been designed to allow downvotes. If people downvote for shitty reasons, then yes, I think they’re being shitty. The platform only dictates functionality, but humans dictate what’s a good use of that functionality. Downvoting well-formed statements of opinion just because you disagree with them stifles discussion, which kind of defeats the entire purpose of making a discussion platform. Or, put another way, it’s shitty.