I agree, and I went to one of these institutions by virtue of living in a town that had school choice. They never (and I say this as a lifelong devoted atheist) EVER shoved "religious indoctrination" down our throats in any way. In fact, at graduation they had a baccalaureate ceremony where students representing all faiths were welcome to speak. My year we had a Buddhist, a Jew, a Christian, a Wiccan, and an Atheist speak, among one or two others who I can't remember. The quality of education was far above and beyond what I could have received at any other fully public or union high school.