I agree with you but I didn’t find a good title that was informative enough ( so it could be a search result ) and short. As I had to choose between the two, I choosed clarity and usefulness over conciseness.
If you add this to the forum guidelines, please add also some examples to help people see how to respect it without lowering the level of valuable information.
But I would advocate against being too strict on this. Naming things correctly is a notorious hard things to do. Maybe give the right to senior members to rephrase the title of someone else post ? And consider it as a help from the community to keep the forum high quality. Not enforced on the original poster, but done as a gentlemen agreement between him/her and a senior member.
Personally I find it more annoying when the thread title is Please Help. Or something equally inane.
You then need to open it to find out if it is something you can help them with.