But those who did write the comments like the upvotes.

Also, the upvotes affect what gets shown to everyone. The more upvoted an article is, the longer it hangs out on the front page. The more upvoted a comment is, the earlier it is shown in the list of comments.

So the upvotes are feedback that matters. They just don't directly affect the upvoter.

Thank you for your reply, if checked with user accounts where score is shown I can see nothing changes in the end. same with posts but not all of them. just the majority