Most of the big box grocery stores carry butternut squash later in the year, it doesn't look like many people are buying it, Publix always has it.
I think most folk cook what they can buy that comes out of cans, there is very little knowledge on how to cook anything outside of beans and potatoes. Often when I try to give stuff away out of my garden I get a "I don't know how to cook it" and get turned down.
It is sad that there are so few actual cooks out there now, most people eat junk and go out for most of their meals.