This is the trouble we often have with schools, of course: When education is seen as an investment, we decide what students should be spending time on based on what is shown (or believed, rather) to have a return on investment in the marketplace. (And not that we really have any idea.)
Setting aside the importance of hobbies and the amateur spirit, what worries me the most is this faulty idea that you should only spend time learning about things if they have a definite “ROI.” Creative people are curious people, and part of being a creative person is allowing yourself the freedom to let your curiosity lead you down strange, divergent paths. You just cannot predict how what you learn will end up “paying off” later.Who’s to say what is and what isn’t professional development? (An audited calligraphy class winds up changing the design of computers, etc.)
Austin Kleon responds to the challenge associated with ‘learning for learning’s sake’. He suggests that we need to invest in hobbies and curiosity, just as much as we focus on ‘return on investment’.