Actually, they do, regularly. But you've used the term "highly specialized jobs" which is unassailable. No matter which example I provide you can provide an even more specialized job that hires less people over a longer timeframe due to the skill gap.

I can tell you with certainty it happens in tech. This is probably not "highly specialized" but unless I am to ignore the very obvious anti-white anti-male undertones of the monthly all-hands HR segments the sorting algorithm based on victim hierarchy is well and truly alive. I work for a coastal company though so perhaps this effective is magnified significantly.