Also you are human like everyone else. Your body will break down eventually and you will age and die. It may be sooner then you think despite your best efforts, you never know when the Big C will hit for instance. You aren't immortal just because you indulge in salads with organic dressing, you are going to die one day like everyone else.
I highly doubt when someone dines at McDonald's they're utterly oblivious that what they're eating is unhealthy. They know, they don't care. It's a fact of life.
It's not ignorance it's will. You could teach a health class full of unhealthy obese people and try to explain everything you know in regards to nutrition and I guarantee you not one of them would listen to you.
Doctors sometimes only prescribe a drug to treat a disease that could very well be managed by lifestyle instead only because they know their patients won't stick to a diet.
Compulsion and addiction is behind obesity, not hidden additives. It's very psychological, trust me.
It sounds more like peoples poor lifestyle choices than a truly broken system.
Alternavista, the system is fine, it may not conform to your god like standards of pure nutrition but in all honesty the food guide is fairly reasonable. That's not the problem, the problem is compulsion. Being obese and smoking and subsequently dying of the health affects is a lifestyle choice. That's right, a "life style choice". It's free will.