I don't know what all this "they" is, but I'm talking from my experience. My close Deltas: father, brother, two exes, mother-in-law. All things that I talk to them has to have a connection with their daily life, an use, a practical or at least human purpose. Exaggerating of course, I'd say that my SF girlfriend is more interested in science than they all put together. My IEE father bought a huge amount of books of all fields and knew a lot of mainstream science facts, though I'd not call that scientific inclinations, as he was rather learning than researching or exploring new directions.
To claim that I was aggrandizing my quadra means that you consider science to be "greater" somehow, thing that IMO is relative and subjective. I indeed consider science-related topics the coolest, but not necessarily greater than say sport, business, whatever.
Edit: besides, Ashton, even if our experiences don't coincide, the stereotype refers to the Delta as a quadra, descriptions and values.
Well said, "they work". You don't talk about the same thing as me.