It’s not really even a reducible exercise. The idea that genes “program” behavior and serve as the blueprint of physiognomy is wrong, a product of our mechanistic worldview; evidence is emerging that the environment triggers and even alters DNA.
The new study, well, not really new, it’s been around for decades, is “Epigenetics” -That non-genetic factors cause the organism’s genes to behave (or “express themselves”) differently.
Sure, all humans are unique, but they are also the same in that a healthy environment is pretty universal. Stresses, prenatal, early childhood and even into adult hood can cause chemical, biological and even genetic changes that cause a myriad of disorders from- loss of intelligence, schizophrenia, susceptibility to addictions, etc..
A fundamental underlying issue in almost all illnesses today is stress. When stress hormones are released into your body, the same hormones that get you ready for fight and flight, also shut off the immune system.