Question about healthy eating campaign?

Ok so shows like the doctors and doctor oz (even disney channel) are trying to make americans stay away from junk food, but if no one ate junk food, the junk food industry wouldn't make any money, people would be healthier (probably) and the medical and drug industry would make less money, and most of all, people would lose their jobs. So isn't it true for the sake of profit that some junk food must be consumed?