You've never spent time with people who were really poor, have you? A lot of people live in situations where their simplest appliances (like ovens) don't work. Or they cannot afford a real (rental) home at all, and live out of extended stay motels.
A bigger group than these are kids who grow up only ever seeing processed, pre-cooked foods. Many of these kids do not watch TV. What they see in their immediate family/friend group is all they know.
There are reasons the obesity rates in the US are worst amongst poor, and especially urban, people. Many privileged, educated people would say it's a moral issue, but it's often an environmental issue.
And probably more than a few "cavemen" died of carbon monoxide poisoning trying to cook over open fires in their "caves".
You've never spent time with people who were really poor
I've been really poor. On non-consecutive occasions.
Many of these kids do not watch TV
No offense, but you're just making shit up. You'd have to go to the most rural area of Mongolia before you find kids without ready access to television. That said, I'm not blaming children for anything--rather, most adults understand that a 99 cent can of pork and beans (available at any convenience mart) is healthier than fast food...and willingly ignore that fact.
No offense, but I have friends who teach in inner city schools and who mentor teens in places as diverse as Washington DC and Portland, OR. We talk about the plight of these kids all the time, and all the "obvious" stuff they don't know, and what's worse, how they don't realize their existences are abnormal because they have little exposure to what normal is. (Not: "Normal" is not a judgment. But if you don't know what options are, you can never be said to be able to choose.)
One of the avenues of "normalizing" is TV. Recently I've been talking with a friend who mentors a teenaged boy who just got himself hooked on meth. I couldn't understand how that could even happen, because "everybody knows that meth is the worst of the worst." My friend explained that he did not realize it's not normal for the aunt who's on meth to be the "stable" one in their family (dad is such a drunk he never eats or buys food… Auntie Meth feeds the boy, somehow). Unfortunately, that poor kid is now fucked.
I also used to live in a part of Baltimore City in the midst of gentrification and shared my block with people who'd lived in the same house for generations and people on welfare. Two of my neighbors on welfare didn't have a TV at all, or radio. Two, from a tiny block of 10 houses. Those happened to be 100% of my neighbors on welfare.
(How did they entertain themselves all day? Well, they didn't. For whatever reason, they had zero curiosity and zero boredom. They did basically nothing. This is not a criticism. They were nice to me, I was nice to them, and given my interactions with their kids, their kids seem to have a better life ahead of them. But the parents were terminally incurious, to the point of not knowing street names just a couple blocks away… because they never went anywhere, not on foot or any other way. It's a given that they could not read, but you don't have to read to pick up a couple street names over 15+ years living in the same place. But I'm not sure that would have made a difference.)
A bigger group than these are kids who grow up only ever seeing processed, pre-cooked foods. Many of these kids do not watch TV. What they see in their immediate family/friend group is all they know.
There are reasons the obesity rates in the US are worst amongst poor, and especially urban, people. Many privileged, educated people would say it's a moral issue, but it's often an environmental issue.
And probably more than a few "cavemen" died of carbon monoxide poisoning trying to cook over open fires in their "caves".