I would agree with that in general, but hunger seems like such an incredibly old issue to deal with from evolutionary perspective. Managing hunger is something "we" have been doing for millions of years and it has always been at the very center of our survival as a species.
The idea that a cultural group could lose its ability to deal with such a key psychological and biological necessity in a short period of time just seems far less likely to me than a change in habits brought about by far more recent industrial and socioeconomic circumstances.
Take that from yet another pseudonymous internet autodidact ;-)