I've had a mixed experience with medical professionals and prevailing medical advice. Through my fathers stroke, my mothers heart attack, both of them being diagnosed with some form of diabetes and/or blood pressure just to be prescribed some meds that make it worse (looking at u metropolol) - time and again we have had to filter their advice through common sense and our own experience. Both my parents are managing their lifestyle and diets, and taking smaller or no doses of the meds the docs are prescribing them with glee it seems.

On nut allergies, we have a tradition in India where pregnant and breast feeding women are given every single type of nut over a period of time in a particular sequence. There is something called panjiri that is an amalgam of nuts and ghee, the idea being to provide sustenance to a pregnant mother and then after birth slowly introducing different nuts (and other foods) into the diet over a period of days/weeks. This stuff has been honed over a period of generations.

Nut allergies are fairly uncommon in India. This isn't some silver bullet thing, but just another piece of evidence not to just listen to medical professionals blindly.