Quite right, and it’s all off the point anyway.
Let’s stipulate that your original point was correct, that the hunter/gatherer society DID have plenty of time on its hands. Those days are long gone. Human settlements have been excavated and dated from 17,000 BC; a reasonable person can assume that humans began to congregate into permanent settlements well before that, but let’s be conservative and say that permanent settlements began about 20K years ago.
The moment that permanent settlements began, division of labor had to have begun; and the moment that division of labor began, some sort of rudimentary capitalism began, as it became necessary to own some sort of unit of value in order to trade for some other unit of value. So, farmers started to grow excess crops to trade for clothing, clothiers started to trade their work for housing etc.
We’ve been in this capitalistic loop 20 thousand years at least, probably longer. That instinct isn’t going away because somebody creates something called “UBI”.
Which was my original point, ultimately.