I'm a lucky one- even as a kid, I would refuse all fastfood, or even to go into McDonald's (I hated the smell, and thought all fast-food was "dirty ").
I was a 90s kid, so convenience and prepackaged foods were all the rage. Some of it even seems like women felt like it was a show of their powerful carers to use more frozen foods, lunchables, etc.... As in "I'm so busy that I can afford these foods and don't have time to cook, because I work." It was as if women couldn't have both a career and cook.
in my house, I had a single mom with a great career and she took a ton of time to make healthy stuff for me, especially after I got diabetes, and so i think that is a huge reason I never developed a taste for fast food/chips/etc....
BUT the one treat she could give me was diet soda, so I was allowed it every night. As an adult, I know I drink way too much diet soda!!!!
Culturally, fast food in my generation was very taboo/ seen as for poor people or for the b oys. None of the popular girls would be caught dead eating that stuff. In fact, half the cheerleading team went vegetarian after the movie "clueless" came out because Alicia Silverstone is a very outspoken vegan. It became the "cool girl" culture to pack a bottled water, rice cakes, carrots and hummus at lunch.