i'm curious, when you say the traits seem to be grnetic, how is it that they seem that way?
That doesn't necessarily mean its genetic, families often have similar environmental conditions as well.
An here's a twin study which shows environmental effects are negligible compared to genetics: https://pmc.ncbi.nlm.nih.gov/articles/PMC4071160/ . I've seen a description from another reasearcher that it is "about as heritable as height" (and yes, environmental factors can affect that as well, but mainly it being reduced by malnutrition. With good nutrition, height is also mostly genetic).
The first example doesn't hold much water for me personally, I wouldn't expect a reputable psychiatrist to make a scientific claim based on undiagnosed conditions...if they weren't diagnosed its not a viable datum.