I get what you're saying, but gaining the required level of expertise for something like this is very time-consuming. In my case (not the OP), my sleep has imp

I get what you're saying, but gaining the required level of expertise for something like this is very time-consuming. In my case (not the OP), my sleep has improved completely since getting on a CPAP, and I don't consider sleep a problem in my life any more. What value is there for me to question what you call the GIN? None, as far as I can tell. For me, they've done exactly what they needed. It's true that there are other who's situation is different. But I wouldn't be so quick to write off what is currently accepted knowledge.