See my answers above. Jay is correct ignorance and fear are the ONLY
reasons people aren't flying. Anyone can walk up to an FBO with a

I doubt these are the only reasons. The return on investment is what
ultimately matters and is perceived differently by different people
when it comes to investing $6000. Just as I don't have any
particularly strong interest in learning to rock climb, I can imagine
there are those who view flying with a similar apathy. In the end it
would be hard to make the case that the PPL has a greater practical
utility than say, learning to ride a horse. PPL flying is a niche
hobby, and its hard to imagine that would change anytime soon.