There are 1.2 billion Catholics in the world. I attended Catholic church growing up, and the pope has a lot of influence on Catholics. Many of these people have portraits of the pope (at the time it was John Paul II) in central areas of their homes. If you aren't part of that community, maybe it is hard to see how much of a difference the pope can make, although I think this pope has been hard to ignore, no matter who you are. When he speaks, hundreds of millions closely listen. And action happens.

He may not really have changed the church on the topics of contraception and abortion, but that's also not what he is really out there talking about. The topic is humility, compassion, and charity. When is the last time these topics really had a globally influential champion?