You're exactly right, this danger exists. And if you read the book on nutrition I suggested, you will see how careful the author is about making conclusions. He actually warns about pretty much the same thing you've just said. Same thing you will see in most of the books I recommended. After reading all those books I have a great sense of respect for all those people seeing how accurate and careful they are in what they say and how this may affect other people.

I don't get it. If you read a book on nutrition and don't take action based on that advice, what was the point of reading it? Sure you should adapt your strategy as new evidence becomes available, but otherwise you are the same as you were before.