I have noticed that low educated parents give sugary foods and drinks such as chocolate and juice to their kids almost everyday, if they are economically okay. This is another way to keep the kid quite and calm, after giving smartphone or tablet to their hand.
It is a cluster of behaviors, isn't it? Then there is also the higher likelihood that the parent is overweight too, so there are likely example expectations set also. And, if parents have been raised this way (which they increasingly are), it all seems "normal".
This might also be related to this mindset;
yep. This could be it too. I hear the "we only had takeout once a month" kind of statements, as if that was a bad thing.