Agreed. Every Sunday, I cook a large portion of something healthy, and store it in containers to eat throughout the week. This past week, it was chili with beans. The week before, chicken vegetable brown rice soup. The week before, chunky vegetable spaghetti sauce with whole wheat noodles. I've become pretty good at cooking, so it's always tasty, good food. I always get at least six large servings from what I cook, and the total cost is rarely more than $10.
For breakfast, I usually have oatmeal cooked with soy milk, with a banana chopped in, sweetened with honey. It's unreasonably good, super easy, very filling, healthy, and dirt cheap - probably less than 50 cents per breakfast.
A plate of sliced apples, avocados, whole wheat toast (ideally good specialty bread from a bakery), baby carrots, cheese, and pickled vegetables also makes for tasty, filling, easy, cheap meal.
I've always strongly disagreed with the notion that healthy food is prohibitively expensive. A quick trip to any grocery store proves that eating healthily is cheaper than eating a bunch of processed food, and I've found that you don't even have to put that much effort into cooking to get something that ticks all the boxes.
I can only conclude that most people are some combination of very lazy when it comes to cooking and ignorant about what's possible.