by moving from hunter-gatherer economies (where every single person was engaged in food production) to agriculture, and then from agriculture to mechanized agri

by moving from hunter-gatherer economies (where every single person was engaged in food production) to agriculture, and then from agriculture to mechanized agribusiness, we created a vast pool of unemployed humans (like 90 to 99% of the human race) who were available to do all sorts of other things, basically everything in the economy that is not food production. The REAL issue there was the availability of the jobless to do new work. To that vast list of productive economic activities we soon will be able to add jobs for newly-former drivers. That really is how it works and it really is not an issue, other than it is what has "paved the way" for our modern high income, high nutrition, high health (by historical standards) lifestyles.