there is no sense in having a downvote that has no value unless the matching upvote likewise has no value. We may not like it but one needs to match the other or there is zero way to deal with those who do abuse the system.

In a better world no one would abuse the system but we don't have that world. So, up and down must balance and carry the same value. I am more inclined to move on than downvote most of them time but there are lots of situations where they are needed and need to be there.