Schizophrenia is the price we pay for minds poised near the edge of a cliff

Schizophrenia is genetic. So you're born with it. This makes zero sense. Maybe you mean shizo-effective which usually has to do with traumas.

Nobody is born with schizophrenia.

Parent most likely meant you are born with the predisposition for it to present when it usually does.

~10%

Induced schizophrenia is well known. Your brain is not a machine. It's several independent chunks of meat that were assembled in situ. There are more failure modes than operational modes.

I also happened to have a schizophrenic father. So I looked into this one a little bit :D

The odd thing is that among identical twins when one has it the other has it roughly 50% of the time. Which suggests that having the generic basis still requires something external, and it is common but not too common.