Point scoring systems in social communication only cause useless dopamine triggers. There's also the side effect that downvotes prevent wrong think, which is occasionally needed to keep a discussion from turning into an echo chamber.

I personally think the best of both worlds would be to allow a variation of both types on the same site. A place like .win or reddit with standard numerical downvotes and upvotes, but with an additional option that allows a user to opt-out. Other people can continue to vote on that person's comments, yet those numbers would be hidden from everybody, including the user themselves. The website code could still see it and promote it like normal if it's popular without all of the associated gamification.