That is, the Church teaches it - until the World says otherwise. It's going to be a long, dark voyage for faithful Christians in the upcoming years. After all, even as an Evangelical I appreciated that the Catholic Church was a rock against which the waves of the latest tended to break. Thanks largely to Pope Francis, that reputation is quickly fading.
The remnant will remain, but the winnowing is going to be staggering. It will be from the ashes of whatever world emerges from our genius that people will start looking at the last century or so and conclude mistakes were made, and it's time to do a Josiah.