Could be banned? What, on the say so of one person? 
Don't watch it if you don't want to! I don't find it frightening, labour does hurt, WTF?
I've never seen it showing any worst case scenarios. Perhaps the newer series are more gory? I only saw the first three.
Surely a "natural birth coach" could USE these scenes to help explain things and encourage good practice. It's no good pretending childbirth is all "ommmm" and meadows. It's not.