Koi, i asked you earlier but you didn't respond. What are you suggesting as an alternative? Screening at birth to try and detect a person's disposition to the illnesses you list. Like i said 65% error rate, it will take many many years to get a grip of this type of technology to the point where it is reliable. Then you have many other mountains to climb.
In the meantime pedophiles like Craig Seville will exist in our society. How exactly do you expect people to react to finding out people that they have been deceived? Take out the physical aspect of the crime, many people TRUSTED this guy in many different ways whilst he was committing CRIMINAL ACTS.
May i respectfully suggest you return to your moral high ground.