Ignorance is bliss...from a state school

There's a rather good piece on CiF by Anne Perkins on the real issue in private and state schooling: The people who complain about the private sector's success at getting students into Oxford and Cambridge are wasting their energy on the wrong target. They need to look elsewhere, to the failure of state schools to inspire and nurture their best talent. But I'm mainly interested in the comments, which are a spectacular caricature of Guardian readers' ignorance and prejudice - except that they're not a caricature but all too real an example of the mindset which has ruined British education for generations.

This comment made me laugh: "What is really wrong about private education providing a better education than state school is that state schools are not providing it."

Can anyone interpret this for me? To which, of course, I can only respond thus: presumably the commenter was educated at a state school.