While there are no human computers who actually add and multiply, there is a lot of programmers. But this is not because they replaced human computers 1:1, it's because electronic computers have replaced huge swaths of everything around us. I go to my kitchen, of all places, and I see my microwave oven, my coffee machine, my bread-making machine, even likely my gas stove all run by small embedded computers. To say nothing of the advanced computer attached to a bunch of radio interfaces most everyone carries around these days.

I'd say this has more to do with https://en.wikipedia.org/wiki/Jevons_paradox