"An estimated 25% or more Americans face a bout of insomnia in a given year..." 
which may actually just be hokum: as [2,3] note, an 8 hour sleep may be a myth.
The article and the drug industry are hot to service such a huge customer base with drugs and coaching.
The problem I have with all this is that, when I read the "problem", I see, "a feature/artifact".
At one point, I thought I had "sleep problems": I would
All the symptoms/issues that I hear are "a problem" (send money).
Over time, I learned some key pieces of information that changed my perspective on sleeping.
(note: if you want more details. read the references and use a search engine).
I find that there are a few key points about "sleep"