I was similarly skeptical until I read it (ever since the first part appeared on HN) and it convinced me on many points.
That said, I think you're half right? SMTM's environmental contagion hypothesis is an explanation for population-level obesity rates, not individual cases of obesity. Anybody who cares sufficiently about their own obesity can change it through individual efforts. However, on a population level, "just change your habits", or even worse, shaming people who are obese, is a less effective strategy than "figure out what is causing their bodies to signal hunger and store fat in dysfunctional, self-harmful ways that they didn't used to anywhere on earth until the mid-1900s".
Well the messaging should be positive. Maybe we someday can have a public informed discussion on health. I don't think shaming will work too well but we have to acknowledge that being fat is not good. But also that it's a fixable thing you shouldn't be ashamed of. When we concede language to protect feelings I'm not sure we're going down the right road. I wish for people to be healthy and their best but you have to know that there are options to be better.
That said, I think you're half right? SMTM's environmental contagion hypothesis is an explanation for population-level obesity rates, not individual cases of obesity. Anybody who cares sufficiently about their own obesity can change it through individual efforts. However, on a population level, "just change your habits", or even worse, shaming people who are obese, is a less effective strategy than "figure out what is causing their bodies to signal hunger and store fat in dysfunctional, self-harmful ways that they didn't used to anywhere on earth until the mid-1900s".