Don't get me wrong, I do also study things that are useful to me. I'm currently trying to learn ASL. But even that shit is out of a personal interest (and desire to be able to communicate with deaf people on *their* terms), not because it'll be useful to me as a nurse.
Okay, maybe I exaggerate the "not because it'll be useful for me" bit. After all, I wanna be an ER nurse. Things that make me better at my job help society. If I can easily communicate with a deaf person using ASL, or with a recent immigrant using their language, that matters for more than just making some leech a bigger profit. It legitimately makes someone's life better, unlike whatever it is these bootlickers think you should waste your free time on.