Who's going to tell you where the good foods are at, that have not been tampered with, and that are compatible with your body, vs the bad foods?
Who's going to train you to cook?
Who'se going to help you with your mental health? As far back as the 1800's Mormons running insane asylums knew fixing diet resolved mental health issues 50% of the time. Most obesity, especially people hundreds of pounds overweight, are due to mental health problems.
And finally, if you're over the tipping point of these problems, how do you overcome them? A Diet for a 500ib person losing weight has to be engineered very differently than someone who's 200ibs looking to lose 10 pounds of belly fat.
This is a complex subject, with an obecity epidemic, you should be asking the questions of "Who poisoned these people?" and also "Do we have a mental health crisis?". Follow those questions to their root and you'll find most of the answer.