Or consider this - the genes they were looking at had nothing in the world to do with it. Problem solved! ;)
On what basis do you believe it/yours to be inherited?
I do not feel that I could definitively know the cause of this complex condition, but I feel some affinity with it (and aversion to its contemporary medical analysis). My favorite thing that I read was the (initially (in the US) lionized and ultimately demonized) Bruno Bettelheim's Empty Fortress. He was an early one to point out the genetic twins point, something which has somewhat amazingly been able to be glossed over by all the test-tube monkeys. Basically, I am concerned that, perhaps the primary political entity, parents, have been able to dismiss this, a virtual Emperor's New Clothes type scenario/campaign. Extreme as it sounds, I myself would not dismiss this out of hand. Finally, I am not at all about assigning any kind of blame, just getting to the truth of the matter.