I don't know about you, but me pointing out genetics is simply my way of explaining how people develop mental illnesses as a result of nature(genetics) +nurture(upbringing and experiences throughout one's life). I do think mentioning genetics is still significant in trying to understand illnesses in general though. If we ignore it using your basis, we may be neglecting a vital source of information of how illnesses come about in the first place.

I'm not blaming genetics. What made you think that? And do you think it is right to purposely avoid understanding mental illnesses just to preserve a fragile peace? We could be missing out on further understand of psychology and mental illnesses as a whole by completely ignoring genetics, like you said.