Is it a free choice if there is coercion involved?
If your parents are threatening the roof over your head, I would say it is not a free choice.
If your wife is threatening divorce you and take the kids, leaving them ever more indoctrinated and farther away from your balanced view of things, I would say that is not a free choice.
Remember, this is a cult. While your argument on the whole sounds reasonable, it just doesn't apply equally to cults. This is not just an alternate philosophy or point of view. There are destructive psychological methods at work that preclude the making of an informed or truly free choice.