From personal experience if someone wanted to claim it affected about 1 in 3 adults I wouldn't think they were far off. I just think there's a big silent crowd who take an interest in the debate because of how much it resonates with them but are too scared/proud/whatever to admit they are suffering too.
That said, there is still a certain argument to be made for the "Stiffen the lip, and press on" attitude. It get's things done, at least.
- - - Updated - - -
Are you suggesting we stop studying everything except one topic at a time or did I grossly misunderstand you?
EDIT: sorry got confused halfway, my bad