It's not the difference of opinion, it's the fact your post adds nothing to the discussion. This adds even less.
There is a reason why upvote exists. It pushes good discussion top. If you are worrying about space complexity: good news! HN is using a modern database, not flat file. You can store 10k comments.
And downvoting helps push bad comments down, which is by design.
> If you are worrying about space complexity: good news! HN is using a modern database, not flat file. You can store 10k comments.
This is irrelevant to having a good discussion.