Geeze. I guess though your experiences there would fall under the anecdotal type. Obviously in a venue that promises a lot of caloric heaven with very little effort, you're bound to see far more of the overweight folks than in, say, our art fairs. We did have a Taco Mama food truck at one, and a hot dog/soft drink/ice cream cone hut at the other.... so not much in the way of a food reward. Plus most of the parking was a block or more away. That might have screened out a lot of the heavier types. But still... we saw plenty of folks who needed to trim down substantially.
This is a huge cost factor in our health care delivery and payment system, and -- I suspect -- a reason why so many "conservatives" are loathe to adopt a national health care system. Not just the cost of providing medical care to obesity-related diseases, but the possibility that self-induced disease conditions may not be covered to the same extent as other conditions.
That's a good topic for discussion: Should your insurer be required to pay the same for your care if your condition is self-induced, as they would for someone whose same condition is not? Example: You are 37, obese, and have a mild heart attack. Your physicians advise a bypass given the extent of CAD, rather than one or two stents. Meanwhile, your normal-weight coworker who is 40 but has a family history of heart disease has a mild heart attack as well. His physicians advise that a stent or two would be helpful, plus a medication regime. Should the insurer that you both have be allowed to require you to pay more out of pocket due to your self-induced condition? Or should they have to cover you both equally? These questions are what insurers grapple with all the time.