Why will they reduce ? Are you suggesting that "I don't agree with this" shouldn't be a perfectly valid reason to downvote it ?
Unless someone is policing the downvote reasons and holding them to some academically or some other rigorous standard, "I think you're wrong" is ... just fine as a reason.
Unless someone is policing the downvote reasons and holding them to some academically or some other rigorous standard, "I think you're wrong" is ... just fine as a reason.