I will confess that I am the type of person Tom was referring to. I loved chips and other dry/crunchy/crispy foods. Before Whole30, I always had to have a bag of potato chips with a sandwich. Eating something soft without something crunchy just didn't seem right -- my family probably embedded this preference in my brain (we also had to end every meal with something sweet, but that's another story).
I could also eat a whole large bag of chips for dinner if there wasn't anything else in the house or I didn't feel like cooking, Before I discovered the Whole30, I switched to buying the chips that make you think you are eating healthier -- the ones made from lentils, veggies, sweet potatoes, popped corn, kale, etc. Having these around resulted in mindless eating.
During my first Whole30 I swapped in nuts to add crunch to my lunches (a particular weak spot for me), but I found them easy to overeat and rough on my stomach. So, I switched to eating an apple with lunch every day (plenty of veggies in addition to the apple, of course). I didn't used to like apples (it was a texture thing with the skin), and now I eat one almost every day, skin and all! They are not dry like chips, but they seem to fulfill that need to have something go crunch between your teeth.