george writes:

The main reason is you don't have the ability..

The main reasons are a lack of money and health, but there are other reasons
as well. With respect to this particular article, small aircraft tend to be
noisy, bumpy, and uncomfortable, and a PPL has little else to look forwards to
unless he has unlimited funds and time. Like Patrick Smith, I don't enjoy
being distracted by heat, noise, etc. I'm glad to see pilots admitting the
same.