[ArialAnemone]

You're not making a convincing argument. Why are the capabilities of plumbers to mentally map various causes and effects and points of failure not subject to the same forces of thought differentials you claim?

My cynicism says that diversity is a result of baizou, not any actual accounting of some magic spread where different and useful ranges of thought are spread in equal proportion mapping to a species of bureaucratic classification of diversity as noted in sex and skin color and nationality.

[Apocryphon]

Programming requires more abstract thought than plumbing. Jobs spoke about the intersection of liberal arts and technology, wrt computer science, not plumbing.