I always wonder things like that as well, and the more I think about it, I’m not sure how much upbringing, at least in my case, has to do with it.
I never tried salami until I was 21-22 years old. Never had it. Not sure it ever saw it in person. One bite…instant love, and I could live on salami. Can’t get enough of the stuff.
With regards to blue cheese, my FIL would eat anything - human garbage disposal. Headcheese, souse, the more objectionable the better. He loved blue cheese.
His wife…hated it. My wife, loves it. Her older sister, hates it. Her middle sister, loves it.
Ultimately, some things just can’t be answered.