Exactly.
I’ve always struggled buying the statement that it was genetic. It seems to be in direct contradiction with Darwinian law. Not being able to pass your genetic material over time is a genetic death sentence; no matter how strong, intelligent, or fast you are. Even if it was genetic, one would think that the carriers of it would have died out over time, because it is so useless to the evolution of the species. Just like tails are to us now.
That is of course, if the theory of evolution is true. I’m just pointing out the contradiction in logic.