Comments that are legitimate and well thought out often get downvoted if they disagree with the popular opinion, but "me too" posts that agree with popular opin

Comments that are legitimate and well thought out often get downvoted if they disagree with the popular opinion, but "me too" posts that agree with popular opinion get voted up. HN should make it clear that voting should reflect the value a comment adds to the conversation and not whether you agree/disagree.