This type of edit is known as polishing a turd. It doesn't matter how much you polish a turd, it's still a turd. In this case, it doesn't matter how much you make the terrible question look presentable,presentable; it's still a terrible question. Editing it is a waste of the editors time, a waste of the time for people who review the queue, a waste of the time for people who have the question "bumped" to the top in the active questions (if the edit gets accepted), and a waste of the limited amount of edits that can be queued; meaning an edit for agooda good question might not be able to be submitted.
Rejecting the edit is the right call here, as it means that the person doesn't get that (albeit temporary, as the question will get deleted) 2 rep, and hopefully they'll learn why their edit was rejected and spend their time making edits to questions that are worth the time of other users.