Some of that is self-protection; I will dive deeply if I love a thing, I haven’t the freedom of time and costs to deep dive into very many things
That’s exactly it. I don’t have the time to “deep dive” into all kinds of things, my time is very limited actually. (Of course, literally, we all have 24h/day, but I can’t spend my entire time with music… music for me is “regeneration”.) But I do like to deep dive into certain things.
Also, as I said, I’m more artist/composer oriented, not so much film oriented when it comes to listening to music. If I like a certain author, chances are I like more of their books, if I like a certain composer, chances are I like more of their music, and that regularly turns out to be so.