Maybe the results of a bad upbringing (Nurture) effect different people differently according to their genetic capabilities, (Nature).
I was brought up horrifically, made to feel I was hated, constantly beaten for just being there, mocked and laughed at, endlessly being told I was stupid and thick, I grew up with no confidence in myself whatsoever and complete self-doubt.
But it didn't make me want to stay at home, I left after school and joined the Navy for a few years then lived on my own forever.
The abuse made me want to completely avoid living with other people, it made me so avoidant that my natural intelligence and abilities had to be relied on to the extent I do literally everything to be independent, I can do everything, fit my new bathroom and kitchen, completely rebuild my car.
As soon as I retire I will try and find a place in the woods to live and grow my own food so I can be completely independent of mankind whom I am still afraid of.