You are directly contributing to humanity's knowledge, I can't imagine many way in which someone could be positively contributing more concretely !
(That's what I tell myself about my phd anyway)
(That's what I tell myself about my phd anyway)
I worked EMS in undergrad; none of my patients ever found me afterwards to thank me, but we _probably_ saved a life or two. (narcan is magical)
it's a fun conversation to have over a few beers.