Someone said :
Thing is, they won't though. The will go off calories alone without ever understanding nutrition. You can stay under your GDA of calories and still eat crap.
According to a quick google search (I'm admitting its not accurate, I'm just making a point), an average sized avocado is circa245 calories whereas a jam donut in Dunkin Donuts is 210 calories.
If you only pay attention to calories you would pick the donut as being lower calorie. But the donut is probably full of transfats, high fructose corn syrup and other harmful stuff, whereas an avocado has plenty of healthy fats, potassium, fibre and vitamins.
People need to take personal responsiblity for educating themselves about this sort of thing. A calorie count isn't going to do much for you if you don't understand what it is you are putting into yourself.
But you always see on the ad's on the TV etc that as "part of a calorie controlled diet" you can lose so much weight. I do have to agree with you on the point that if it is only a calorie controlled diet and you go for a product that is high in saturated fat (for example) then you might die young from heart disease.
It is all about educating yourself as to what you really eat, and how healthy you eat as well.
If you see on a restaurant menu all the calories that are in each meal as well as fat content (these are already on packets of crisps and outside packaging of most food you buy) then you can make an informed decision on what to have and what to avoid instead of second guessing what you might have, and how many calories etc is in it.
I heard today that there was a person going around with a Big Mac meal and asking people how many calories they taught was in the meal - most people got it WRONG so it does need to be drilled home to people and I think this is a good way of doing it.