John Kulp wrote:

Perhaps. It's been a loooong time since I was piloting aircraft. But
then, what are the fees being talked about for exactly? Why, exactly,
are the majors talking about their customers paying almost all the
freight then?

They are paying for the services they are using. Most of the infrastructure
is there because of the airlines and their passengers. All those little
airplanes and even the CEO jets that are flying around can and do function
quite well without much less.