I actually like that we're never going to completely figure it out- things that completely make sense at some point bore me cause they can't keep me engaged and wondering and theorising forever lol.
The studying bit though, is less about individual motivations and more about large patterns- and identifying patterns and theorising about why the pattern emerges is pretty fun. People are socialised to behave some ways and they're definitely shaped partly by their society so this does help with individual motivations too, just not entirely.
Lol now I decided to google Heavenly Hash too and the first thing I saw: 'A bite of this ice cream and you'll hear the angels sing.'