They schedule one cause they want to, not for any medical reason, its like they do it cause they think they are 'too good & rich' to go through all the labor contractions & deliver vaginally, why do they?
I didn't know that celebrities did but my doctor told me that a lot of Europeans do now a days. He said that it helps preserve your "area" down there. With a c-section you don't loose the muscle control that is associated with urination, you don't loose the vaginal shape and muscularity and later in life your chances of uterine prolapse is much much less. Those aren't very good reasons if you ask me (I've had two unwanted c-sections). You miss the joy of bringing and laboring to bring you baby into the world in exchange for having your baby surgically removed. Not a good trade if you ask me.