To trust ANY education system to do what is best for your child is probably a bad idea. The only possible exception to this rule is if your child is developmentally challenged. The state will pay $40,000 / year to support a person who will never return a cent back to the economy. Unfortunately for the challenged individual, the state will spend most of the money on tracking every one of his movements as opposed to allowing the caregiver (er teacher) to help the child develop into the maximal human that he might become.
I will be doing my best to make sure my children have access to things that help them become better. I can't expect my school system to do it for me.