In the old days even the dumbest man could carry grain from one place to another or push a plow. Even the dumbest woman could churn butter or milk a cow when told to.
These low-IQ individuals do not have the mental capacity to switch to Python programming - regardless of education.
So the "IQ floor" of the economy is rising. The result is that the high IQ people are fine, but low IQ people end up simply unemployable at any job. It's only in the last 50 years that the IQ floor rose above an undeniably noticeable chunk of the population. 10% of people are under IQ 85, which is too dumb to join the US army (by law). Too dumb to be trusted with powered construction equipment.
Leftists can't conceptualize this problem because of their egalitarian worldview, and rightists either talk about bootstraps or might not even care, seeing it as a sort of justified Darwinism.