most of the folks getting ubereats delivery are not the target demo for being a PA client. but you don't have to be super wealthy for the economics of it to work out.
most tech employees make enough that they could pay 10-15 hrs of low wage work every week to do stuff like pick up your laundry/groceries, pick up a food order that you've called in, take stuff to the post office, etc.
most tech employees in SF