Let me put it another way: most children who have some medical doctor in their extended family don't really need to be visited regularly by a pediatrician. That doesn't really imply that most people who refuse to take their kids to a doctor are in their right mind to do so: a lot of them have some weird belief that might put their kids life at risk. And even if they weren't a majority, but a tiny minority, the law needs to protect that tiny minority even if that means being a bit overbearing on people who have doctors in their families.
