I think after the last few years of these kinds of things coming out, the takeaway is pretty simple: be fairly sceptical of 'advice' coming out of large governing bodies and instead just be sensible. Don't eat too much food. Limit processed foods. Eat lots of fruit and vegetables. Eat a large variety of foods. Be active. These rudimentary guidelines are clearly difficult for a lot of people to follow, but I think it'…
Yeah. But humans haven't had fresh fruit available all year round until recently. Similarly, there was never a wide range of foods available. I'm not sure we've got enough evidence to say that changing our diet to include lots of fruit and a wide variety of foods is safe. The encouragement to do this is coming from large governing bodies. I'm off to eat nothing but turnips for a year and get scurvy :-)
Certain groups like Europeans haven't, but humans have lived in lots of places that have year-round fresh fruit for quite a long time.