Just out of curiosity is this that different than Christian Scientists view?
This is where things get tricky. If all religions are equally valid, then who is to say that she was wrong for starving her baby (or aborting it or whatever)? If she was wrong, then we must have some kind of standard for evaluating the validity of a religion.
That's a dangerous situation to be in, but once upon a time we had such a standard and knew how to use it. Now we don't.
So, if I have a religion that wants me to smoke dope once a week? This has come up before and the courts ruled that society had a reson for keeping them from practicing their religion. That was the wrong ruling and is a danger to us all. It would have been far better to rule the religion not a valid religion. That can also be dangerous, but we should be able to define a valid religion in a way that is not dangerous.
Unfortunately, modern USA has denied itself the ability to make such distinctions.
Shalom.