It’s an interesting idea, but I don’t know. Lawyers and doctors also say the workload burns them out. Some doctors have to do 24 hour shifts which are more than 3x physically demanding than working 1 8 hour day.
I understand what you mean by hobby though. It’s toxic to discount people feeling shitty. But the biggest complainers I know - maybe the shittiest people - get into programming or the guilded professions to make money.