Actually some of us do it as a context switch and a tie to our roots.
Some of us, myself included consider it to be a valuable skill in an unstable world and some insurance against the fuckwits we have to trust in society.
Also the stuff tastes better.
Look at me exercising a form of conspicuous consumption (the time of a highly educated profeasional) that my class and culture peers think are praiseworthy. Let me say everyone should indulge in my hobby. Let's look down on those who don't together.