“On the other hand, there is evidence (e.g., brain differences) that indicate it likely has some organic component, even if that might not be something at birth.”
LOL -you are hilarious... Evidence for what? There are brain differences in heroin addicts too -so what?
I suggest that human beings that practice odd and or unhealthy behviors repeatedly have much evidence that they act differently (e.g., loose spichters AND brain differences)...
You need to slow down and read more carefully.