The logic of Begoglio's argument is that all those martyrs we commemorate were just wasting their time, they could more sensibly have just chosen the other faith option. Every missionary, too, was just someone with a bad career choice. Shameful.
It's probably more correct that God allows such "diversity" as He allows humanity to commit many other errors through the exercise of their free will. God does not want humanity to sin, but He permits it.