The morbidly obese that take it seriously (I.e. ditch the junk and the drinks) would likely not be able to consume their tdee in healthy produce alone (save for maybe snacking constantly on nuts) so invariably start losing weight. Especially if they have become more active and don't overcompensate for that or reward that exercise with food. I've read maybe a handful of honest weightloss journeys attributed to this lifestyle intervention on tumblr. And maybe one or two of those that questioned fat acceptance as a consequence. In fact I think one of my blog followers is a fat acceptance ...umm, what do I call them?... escapee (?) but I can't remember who, and I didn't save their post I read. The exception is small I think though, 'pizza sisters 4 lyfe' en masse are still positively buying pizza I'm sure, whilst, of course, claiming 'mah body positivity.'