Also a culture of snacking and telling people they can't go hungry even for a minute.

When I was a kid (not so long ago!) I'd eat breakfast in the morning, something small like a sandwich for lunch at school and then dinner at home with the family. There was nothing in between or nothing in the house to eat in between. Leftovers from previous day maybe? Had to wait until mom prepared the dinner. No candy bars or a bags of nuts or crisps.

Now people just reach out and grab an extremely high-calorie snack at any time. It's a habit, a way of passing time.