The problem is not exactly PTF.
In the "good old days" only 1 in 7 (for my company) or 1 in 10, or whatever, of finalists in airline interviewing got a job!
(Maybe 1 in 50-100 of initial applicants)
The others flew for "lesser" carriers or gave up and became lawyers, bankers etc.
These days anyone with the money and a pulse can get a job.
Hopefully the rash of "just cannot fly" accidents around the world will gradually bring change.