In biology there will be more than 2 sides to an issue as everyone gets their theories published based upon their test groups who may vary wildly across the population.
If someone smokes 3 packs of cigarettes a day will they get cancer? Maybe... Science cannot speak in absolutes with disease caused by habits or actions because there are always those individuals who defy the rules.
This and what you and LP have posted is a small example of WHY there is SO much confusion in the health and nutrition field. They both could be right and wrong at the same time. Right within their "observed" respective studies and wrong in terms of absolution.
With the recent knowledge that what we eat today will affect our decedents through DNA\RNA mutation for up to four generations, and given the vast variety of our diets, even among those who live next door to each other, is it any wonder one set of health methods or processes does not work for everyone?