Might have to clarify that my instance (or rather Mbin in general) doesn't do auto upvotes.

Though it doesn't really change my stance. You can swap it around to removing the auto upvote, I don't really see the point behind that being possible either.

If you like your content, keep it up. If you don't like it, either edit it until you do or delete it.
Upvotes and downvotes are for judging the content of others, not your own. So be it adding one when there's zero, or removing the upvote automatically added by your instance, I don't see the point in either being possible.