I don't think most WW tell the H the true issue at hand. She will either complain about something from years earlier, or give anything the she thinks sound good enough to be a justifiable excuse to break up the M.
I think this is spot on. It took me a while to realize this. My wife gave me a very specific issue that was our problem, something she knew I could not argue against, something she said could never be changed. I took me a while to realize the issue she mentioned was just a symptom... the real problem (I believe anyway) is much deeper and along the lines of what Sandi mentions (along with some other things). Once I realized this, I could at least understand things much better.