If you find that people are saying things or repeating things that you do not find helpful, then do not respond.
I notice that many people on this thread (and others) seem to think that saying the same thing again will get a different response.
But if you do not respond, they will not feel the need to restate.
And picking and choosing what you want to engage with is probably a very good thing. Just because someone writes, does not mean you need to acknowledge.