Well, at least, you're honest lol.
However, I love prompts.
Some of the sweetest writers come up with them, and it's my way of showing support to them in a fun way. I love being able to shoutout writers, and doing prompts gives me the opportunity to shoutout the creator and writers that tag me. (And as I am going through some of the worst writer's block in my five year writing journey, they are a breath of fresh air to keep me writing.)
I enjoy reading them too. Some writers are super blunt and hilarious with their answers.
I don't think they help anyone become a more outstanding writer, but I do think it plays a part in the fun and connection on here. (: