Tina writes:

It's worth remembering earning a pilots license is less expensive
than, for instance, leaving the US to live in, say, Paris.

No, it's not. In fact, living in Paris is much cheaper than visiting Paris as
well.

And many more in the US learn to fly than abandon this country to live
in, say, Paris.

There are about ten times as many American pilots are there are Americans in
Paris. But it's really comparing apples and oranges.