The age 65 rule ended the chance of a massive retirement of Vietnam era pilots. So no pilot shortage.
Now there are what 10k pilots on the street? So that will stop any future pilot shortage at least short term.
Plus how fragile our career is so obvious looking at the ash cloud problem. One natural disaster and airlines are loosing money like it is going out of style.
The gradual decline in aviation will match the number of people who want to become pilots. There will be no shortage.