[on_the_train]

It's ok to have a hobby. Not everything needs to be minmaxed to extract the maximum amount of money from the system.

[em-bee]

the question is, if we as a society want to encourage activities that are for the benefit of everyone.

a sport maybe a hobby. running a sportsclub is volunteer work. writing code for fun is a hobby, publishing and maintaining it for others should be volunteer work.