Very true. Once upon a time, when non-Catholics did for some reason or another attend a Catholic school, they were actually required to go to mass (which used to be daily in many schools) even though they couldn't go to Communion, etc. The schools stopped requiring even this much because, believe it or not, the non-Catholic parents whose kids were getting a good private education objected to this minimal demand.
In fact in some areas, I think you'd find that the majority of students in the supposed Catholic school aren't Catholic and many of the teachers are not Catholic either. And we won't even get into things like the Canadian Catholic school that has a lot of Muslim students and is permitting Muslim religious classes in the school...
Yes, a very sad state of affairs.