It could even be the case... and bear with me here because this is a
shocking idea... it could even by the case that things that are
not necessarily reasons to self-flaggelate are involved too. It surely could be that we don't exercise enough and we are all fat flabbly slobs who need to be beaten until we are good little boys and girls, but it could
also be that we have legitimate genetic differences and for all we know our Western ancestors from a thousand years ago would also have had a quite different gut biome than the people isolated in Asia. It could be that we eat starchy processed crappy crap and should apologize repeatedly to ourselves until we stop whipping ourselves which we shouldn't ever do, but it could
also be that even a healthy Western diet still involves substantially different fruits, vegetables, leafs, meats, etc. from other diets what with being over 10,000 miles away and in radically different ecosystems even when they were totally wild.
Maybe if we want to do real science and not just find exactly and only what we were looking for, as we go into this new domain that is basically entirely unexplored, we should try to do so with open eyes instead of decades-old preconceptions.
Or it could just be that we're bad, bad people and should feel bad.
(Sorry. Well, sorry-ish. This unrelenting stream of "You Suck And Everything About You Is Wrong And We're Going To Mention It At Every Opportunity" in the news is really getting on my nerves after 30+ years of it.)