The artist who gives up an hour of work for an hour of conversation with a friend knows that he is sacrificing a reality for something that does not exist.
The argument of socialists, that people really want to share, beyond a reasonable level of charity, is rubbish, though it is espoused by a lot of rich, pious hypocrites who want to share only enough to avoid widespread starvation, mob violence, and government seizure of more of their incomes.