Can the type of food we eat cause fat to accumulate preferentially in the belly? Do diet choices affect how much muscle we build? It's an important matter, because belly fat isn't just an esthetic issue.
Do we know everything there is to know about how omega-6 fats affect our health? Of course not. But is the notion of an optimal ratio of omega-6 to omega-3 a myth with absolutely no data to support it? Hardly.