I'm obviously not going to make your argument for you.

Having it one sided clearly doesn't defeat the purpose of votes. When you went to the ballot box do you upvote your chosen candidate and also downvote your least favourite?

Not having downvotes is a simple statement: "If you do not like this thing, we don't care". Report the spam and block the creators you don't like, simples.

So you use my logic for upvotes, which you clearly didn't, and maybe you'll see why it's downvotes that are removed and not upvotes.

See, if downvotes were active you might have just gainsayed and moved on and we wouldn't have had this interaction. Neat huh?