This is true and not at all. Last year, I quit my job, because I was in the process of getting a burn-out. It was primarily because management refused to give me recognition for my efforts. (I dreamed about it last night.) While I was unemployed, I did voluntairy work at a farming coop, physical labour, often simple weeding. Working there for just one morning per week felt more rewarding than working as a SWE. You could always see the results of your work with your own eyes.