I agree. Let's finally get rid of this tag. It and its siblings are meta tags — they don't help people decide whether they might find the question interesting.
A question with just a proof or algorithm and no question other than “is this correct?” can usually be closed as too broad. A question with a proof or algorithm and a specific question (“Is this a ...
It is now possible to protect a tag from this silent deletion by [writing a tag wiki] (Do not expire single-use tags that have a tag wiki).
So that's one more incentive to write a tag wiki when you create a tag.