Take your point, it is valid, but what a poor look out for diversity in people if institutional pressure churns out clones, year after year. If there were no church schools this situation would not occur. There would be no sanctioning based on religion.
I was talking to my girl friend about not having religious schools at all but to mandate that EVERY religion had to be taught to ALL children equally. If you were raised with all the religions in your consciouseness and religion was truly a matter of choice, you could appreciate more the choice of others with differing views.
I appreciate that this is pie in the sky for many differing reasons, but I reckon that most of us believe what we know about. That is to say, who can believe in any god unless they are taught about it?