Jim Logajan writes:

That claim is incorrect - where did you get it?

Dividing 240,000 (the number of pilots I could recall) by 300 million.

The current number of
active pilots is ~0.2% of the entire U.S. population and if one includes
the number of people who learned to fly but are no longer active, the
number is probably even larger. About 30 years ago the number of active
pilots was ~0.4% of the entire U.S. population.

Wow.

If one does a comparison with the number of licensed automobile drivers (an
arguably better metric than using the entire population) there are about
330 licensed automobile drivers for every certificated aircraft pilots.

Looks like there's room for improvement.