Nobody is arguing that there shouldn't still be public funding of education. If I had a kid in special ed I'd want to send him/her to the best school possible for his/her unique challenges Right now the only option is public school unless you can afford massive private school tuition.

With more private schools, smaller, more specialized schools would develop. Someone passionate about teaching special ed would have the chance to make such a profound difference in this setting compared to the public school status quo.