A 50 billion dollar industry is established upon the weaknesses of gluttons around the world, why...?

That's the way the world is (well that's what I see in American society). I've noticed that the world usually is looking to TAKE from you as quickly as possible rather than give to you. So exploiting weaknesses instead of building you up perhaps by TEACHING you how to care for your body is the way of the world. Why is it this way? Because it pays the bills........