> So they're pre-ordained not to?

No. I'm saying it's within their power, so they aren't pre-ordained either way. You were suggesting that it's impossible for a large percentage of the population to not be obese without medical intervention, that it was comparable to excessive acid production which is a genetic anomaly and out of an individual's own control.

> What if that cultural one is letting the processed foods industry engineer everything to be deeply addicting?

Sure, the industry bears some blame and is part of the cultural issue, but even if presented with addicting substances, it is both an individual choice to consume them and a collective cultural choice not to regulate them.