Humans are a pretty lazy bunch
It's time to face the facts. Humans are lazy animals. We also work a lot, have TV shows to watch, commute, watch kids, pay bills, and oh my God what have we gotten ourselves into?
Food design has evolved with modern life -- chopping up a head of broccoli and steaming it takes far more time than grabbing a burger from the drive-thru or reaching for a bag of chips. Stacy Goldberg, founder of Savorfull, also notes that unhealthy food is way more accessible when we're on the go, meaning crappy choices are super easy to make. "Vending machines, cafeterias, and convenience stores are stocked full of sugary, fatty foods that are likely to prey on our cravings."
It would be nice if vending machines sold fresh fruits and veggies, but that's only a reality in a few places. When the easiest food to grab is a candy bar, and not pre-chopped carrot sticks, you learn to crave that sugar hit, especially when your blood sugar inevitably drops and your body tells you you're hungry again.