Yes, logic wins arguments, but to continue with metaphors, I'm sure you have heard of the halting problem. Without upvotes, the thread will go on forever. Vote counts allows for closure. So threads are shorter and I'm happy to extract more information faster.

yeh, logic wins arguments. but people will upvote the comment that is most logical, which should also be the correct one. if a comment is illogical, then its also incorrect. so basically, the right and logical ones will get upvoted. whule the stupid, illogical, and wrong ones will get downvoted