It boils down to an unfathomable lack of activity, eating way too much and being stressed out of your mind trying to buy shit you won't even use.
As far as reading food labels, we just grocery shopped yesterday, I honestly think there were 1 or 2 things in the entire cart that would have required a label. The only thing with labels would be sourdough bread and I bought some cereal for post workout. Now, when I am hunting I buy garbage, but, that stuff makes it easier to get the calories in, which is what I need then.
And, as far as science "lying". It's not science that lies, it's how the media portrays the science to serve their narrative. They (media) misrepresent data ALL THE TIME. If you go and read the actual literature, you'll find that it very rarely supports what the media is saying, regardless of issue.