There is no arguing that the food has changed as scientific methods to enchance food has progressed.. Processed foods created specifically to create habit and or addiction are much more prevalent. People are less educated about the methods and the food companies know this. Ultimately you have to get educated but lets not pretend the food companies are not specifically trying to get people addicted to their product.Easy, laziness. Our society is glued to TV's etc. My coworker is overweight and joined a gym. I think she might have been once in 2 months. Maybe. I'm not even sure if she went the first time or if that was just to pay for the membership. I work out at my house every day for an hour. I used to weigh 206 lbs and got down to 139 just to see what I could do. I am back up to about 170 now but I bulked up a little. I watch what I eat.
Then there's the matter of the proportion of time put into it. We consumers get thirty seconds to read and interpret an ingredients label, on our own. Junk food companies have labs dedicated 24/7 to finding the next high fructose corn syrup, the next aspartame, the next cottonseed oil, and at the same time advertising agencies dedicated 24/7 to pushing the results. And pushing it in ways that are a lot more subtle than direct advertising.