what you are posting is controversial and not accepted by everyone in the medical profession
Nutrigenomics might be in its infancy but it's hardly a controversial science! Hippocrates told us to 'let food be thy medicine and medicine be thy food'. Never truer words: ''You are what you eat''.
(Fecal transplant has ethical consequences)
The necessity of cholesterol for multiple bodily function (including bile salts to digest fat) is never being disputed and it's certainly not controversial.
That we need good fats, including satured fat (included even in the super low fat Scarsdale diet) is not disputed.
The quantity of dietary saturated fat remains an open discussion.
High fibre in one's diet is not controversial and universally accepted.
'Sugar is bad for you' is universally accepted but its toxicity is open for debate. Very interesting research is emerging about the role of glucose and fructose in angiogenesis of cancers.
Avoiding simple and refined carbohydrates as they raise insulin it's also widely accepted and not controversial.
Eating complex carbohydrates, especially in the form of vegetables is amply promoted. Grains, wheat in particular, are a hot topic but, with research advancing, their dietary role will become more defined. Research on Celiac and Gluten Sensitivity is advancing at quite a rapid rate: explains. This is another interesting article on dietary grains in celiac. The discovery of zonulin (by Dr Alessio Fasano ) has opened a lot doors (!) in the field of autoimmune diseases, including mental health disorders. You never know we might one day discover that perimenopausal symptoms are an autoimmune response!
So the million dollar question has to be how much dietary fat and complex carbohydrates should we ingest? Maybe we should all contribute a sample of our microbiota to the British microbiome project. to investigate. 
All said, I agree with you. The eat less, exercise more mantra is still the standard advice. However, the fecal transplant that made a patient obese has opened a lot eyes! Gut Reaction part1 and 2 introduces us to a lot of microbiome research projects from obesity to curing COPD and asthma. Well worth a watch.