Just consider this option before rejecting it:

Bad faith, trolling, community or instance rule-breaking, and other edge cases deserve downvotes. Everything said in good faith even if you disagree with it deserves no-votes or upvotes.

The benefit is that this does not chill discussions and create an echo chamber. Because that's what downvoting just because you don't agree does. It means those people and opinions and stories just don't appear after you disincentivize people from posting them. And it's worse for stories - a smart person will want to see stories that reflect reality, even if you don't like them (which is what this post is).

So actually, the type of downvoting you are (I assume) defending is precisely what creates that no negative, only happy, toxic positivity safe space.