I have talked with him about the same idea, removing both upvote and downvote.
https://steemit.com/sct/@jack8831/2e3fqa-2019-11-27#@clayop/q1mxdi

The core question of them, if I understand correctly, is removing downvote being the status quo. So your answer "yes" is considered as "no decision". See my answer with the same goal of yours.