There probably is an epigenetic factor, tbh. They did find a link between eating in abundance while pregnant and how it effected risk for diabetes that had to do with epigentics. Good thing you can alter your epigentics through lifestyle practices. I mean, they're still gonna drop that epi part to absolve themselves of any agency, and fat parents teach their kids how to be fat and if your whole family is fat then obviously it's genetic. But it is possible that there's a legit epigenetic factor at play here.