From another more strictly moderated web site:

Question:
I have a good idea for a thread. Can I start it?

Answer:
First, please look at the list of all existing threads, and make sure you're not duplicating something that's already being discussed elsewhere. Because if you do duplicate an existing thread, your thread will get closed. You can use the Forum Subject Search to help out in this matter.


However, this type of moderation requires a lot more of the volunteers and I don't know if that's possible.

FWIW I agree with your post and share your frustration.