I am not quite sure what you are saying.

Lets say hypothetically someone with a perfect genome develops schizophrenia only through their own actions and having nothing to do with the actions of others. Does that person deserve scorn and judgement? There are reasons but those reasons are entirely their own doing. Do they deserve our scorn and judgment? I think you are saying they don't because as humans we are all doing the best we can with what tools we have. What is wrong with escaping the scorn and judgment of others no matter what reasons we use to do it? What difference does it make if I say it was genetics or if I say my parents were both heroin addicts and abandoned me? And what about Ted Bundy? There are reasons he is the way he is and reasons he did what he did. Does he deserve scorn and judgement? Does he deserve self respect?

Self respect rides on a whole lot of things. I think it rides primarily on self acceptance, self love, and self forgiveness, and yes it rides on how others view us. Why wouldn't we want others to accept us the way we are no matter the reasons of how we got the way we are including genetics? I am sure a black person wants to be accepted exactly as they are and not discriminated against because their genetics gave them black skin. Genetics are rather important in that case because we are born with certain levels of melanin due to genetics and have absolutely no control over it so should not be judged or scorned because of it.