Actually, some people just choose NOT to make the time. A home cooked healthy meal can be accomplished often in less than 30 minutes. Many a night it takes longer for a pot of water to boil for pasta, noodles, or rice than it takes me to cook the entire meal.
About once every 10 days, I run production on 3 main courses, cooking up enough to last through a good many meals. For example, this might consist of spaghetti sauce, seafood Alfredo and chicken marsala. One portion of each goes into the frig, the remaining portions into the freezer. In the morning, I pick which one I want, let it thaw during the day then microwave it later. Rice microwaves fast and so do potatoes. A thawed half-slab of pork ribs broils in about 20 minutes. Baby backs are even faster. While things are heating or cooking, I'm free to do something else until the timer goes off. Want your fruits and veggies fast? All you need is a blender, juicer or food processor. I have them all. There's just no excuse for not eating well at home.