It's because the parents are lazy and its easier for them to buy junk food them to prepare a meal. The children follow their parents. Their parents are condoning the bad habit which in return gives the children a bad life style. As for Disney movies, I don't see any difference between the Disney movies of today vs the ones 20 years ago. I wouldn't say they're propagandizing your children, but children are Disney's main audience they focus on so they're going to try to what kids can relate too.