Most people cannot conceive that they don't have to eat the things they eat from a restaurant --- or that they are free to do something non-traditional, in general. In their mind, cooking means cooking the things they order at a restaurant. They don't think they are able to do so or they don't think they have enough time, so it's not an option for them. I hear people talk about healthy eating as expensive, because supposedly-healthy meals are sold at a premium to health-conscious customers at restaurants.
It's not hard to do simple, health, quick meal prep. Hell, buy some veggies, wash them and eat them is health as hell. Make rice or beans in 20 min.
If you have enough time to walk or drive to get fast food, you have enough time to make a healthy meal.