I disagree, if you're going to post something then you're generally asking for people to comment on their personal opinions, or comment on your opinion. And if someone is objectively wrong, or is trolling or anything then downvoting is pretty much necessary so others know that the post is not worth looking at.
It's only a downvote, no need to stress so much over it. Also I'm not sure but a moderator had said that when a post receives more downvotes then it helps them to detect the post faster and take it down but I'm not sure whether that is true.
Someone recently down-voted one of my posts, which seemed pretty mean. Why not abolish downvotes altogether? If someone doesn't like a comment or post, they can simply refrain from upvoting.