I do not think this is exactly true. People may stop eating junk outside. But having a healthy balanced diet is more expensive than buying junk and eating at home; and not only in money, but more importantly (maybe) in time. Cooking takes time and effort, which families with both working parents may struggle with. Please do not forget often those people have more exhausting and abusive jobs.
I know from first hand, how difficult can it be in that environment with limited money, time, and energy to go to the grocery store often, buy fresh things, and cook. It is much more convenient to buy things that go in the freezer, when they are in offer, and throw them into the oven when arriving home.
I know from first hand, how difficult can it be in that environment with limited money, time, and energy to go to the grocery store often, buy fresh things, and cook. It is much more convenient to buy things that go in the freezer, when they are in offer, and throw them into the oven when arriving home.