She's not exactly an unbiased observer. The only ones we've actually seen were fine. That doesn't mean there aren't a lot out there that aren't. There certainly are. But we don't know how many that actually are.Mathy was particularly bad, but as she said two updates ago the vast majority of families treat having a wizard kid as the kid dying. It is still pretty damn bad.
On this, I'm not going to take her internal monologue as accurate.