All this talk of self-study, learning without being instructed, sounds like wishful thinking to me, too, when some very good methods have been developed over the decades. For instance, the idea of practicing skills in "confined water" before moving on to "open water" is brilliant, and I would like to believe intuitively obvious to would-be divers attempting to learn on their own. Yet I can envision people jumping into deep-ish water to try out skills. How many people even have access to a pool? Oh sure, learning scuba is easy ... yet we often see posts from OW students who have difficulty with clearing a mask. My guess is that the people who are capable of learning scuba on their own are a minority.