"This epidemic has been constructed to the benefit of the medical industry that has in part medicalized the treatment of obesity over the years. While there may be a rise in 'obesity,' the BMI is not always accurate. Some scholars describe this epidemic more as a moral panic. While there may be some truths to rising rates, they have been overstated."
Unfortunately, you don't hear this much but rather just how significant the obesity rate is. I still often wonder if this obesity hysteria would not have been so dramatic had the BMI cut offs for branding someone "overweight" been lowered. To me, there was a correlation between that and the mass thinking of the obesity epidemic.