I would think for the vast majority the "choice" is to either follow their parent's/peer group's/school's religion or don't bother at all.
Fortunately good education has ensured that this was neither my case nor my children's. We all have different views. Mine is probably the most eclectic (I reject the idea of religious exclusivity but find great wisdom in many religious texts), #1 the most knowledgeable by far and the most questioning.
Organ music is predominantly "Western Christian" - so a relief that is not forbidden. Readings etc from a wider base. Given that some of the most beautiful organ music was written under patronage of the church, it would be hard to avoid this. But I wouldn't want to avoid it anyway, it's remarkably inspiring.