Not dumb, cheap. If you can engineer multiple things to flow through one pathway instead of 2, you save pennies.? Volume fidelity, tubes, transistors, generators or cars, even animals, are generally at their best at mid output. It's not ideal, but it's life.
But some volume-inclusive circuits will demand all or most of the output available to boost co-functions to tip 1's & 0 threshold levels. No doubt there are those who ascribe to Steven Jobs and those who follow Clive Sinclair. There's a song; "It's a mixed up ___ world."
But you're still right - It's funny... Even if you understand it.
Take my wife........
Please.
BillSF9c