So a homeschooler killed someone? How many public school "graduates" are sittling in our jails or killed someone? A million.
However, here's my second. I think his point is something like this:
It's valid to report on HSers' academic excellence, since "the line" on HSing is that it gives a substandard education. Therefore, it's news when the type is bucked.
Similarly, and infinitely less happily, since "the line" (--OUR line) on HSing is that it produces kids who are as a rule better-educated, better-raised, and better-socialized, it is news when that type is bucked, too.
This bucks that type. Hence, it is news.
I reluctantly have to grant his point, if I've taken it correctly. And what it suggests further is also interesting, to wit: