> For this to be true, it would have to be true that the millions of people struggling with weight, and the tens of thousands of researchers in the field, are all simply idiots who are not as smart as you.

There's no need to leap to 'idiocy', it could mean the people struggling with weight have either poor willpower, or honestly don't know how to eat well. You can see this by watching shows like 'Secret Eaters' and seeing how incredibly common it is that people are over-eating and just don't realise it.

And researchers will research wherever there's funding/academic opportunity.