I'll agree with your entire post except for the first part.

You restrict the "pilot shortage" verbiage to "the majors and quality corporate jobs"; and that may be the end goal - but the PILOT SHORTAGE ranges the entire spectrum of professional pilot positions - and in this case there ARE pilot shortages.
Depending on your stage in the career timeline - you may experience a pilot shoratge - which should be a good thing. As you progress up the ladder - there is less and less of a pilot shortage until you get to "the majors and quality corporate jobs" where there is likely never going to be a real shortage of pilots jobs - just like any pyramid set-up.