Perhaps for some posts / comments. But definitely not for all of them. Votes can often be more useful than just feel good or feel bad. Very busy posts often have hundreds of comments.while certainly silly memes and the like may get upvoted there, often relevant or helpful comments do too, with unhelpful or toxic comments generally getting downvoted. Without that system in place I would have to scroll through those hundreds of comments just to find relevant or helpful info instead of not being at the top because the community provided feedback.