Is it harder to create generalists than specialists?
The fine grained resolution we have with respect to actuation and tactile sensing might be harder nut to crack than honing down on the regularities in our cortex. A teacher for example needs to guide your hand when you learn to write or prevents you quietly from drowning when you learn to swim.
Even a truck driver might be more a generalist than a specialist. A truck driver jumps out of his truck to unload, fill in papers, prevent people hitchhiking in the back, prevent theft, taking detours, finding an address even with errors in the administration.
I also doubt sincerely that we will be able to tune the AI in such way that they will be content with all the jobs humans do not do anymore. Are we able and willing to codify a society on intellect? Will we be willingly creating unambitious AIs for particular dull tasks?