Much like the many American Catholics are on B.C. pills?
The situations aren't entirely parallel. The official teachings of the RC Church on BC remains unchanged and Catholics on BC are objectively disobeying their religion. However, actual documents and catechisms on the Bible written by church authorities and disseminated in Church media actually often state the exact opposite of what the old documents did, thus indicating a change in the "unchangeable" doctrines of the Church. And if you ask them why, they'll tell you these old doctrines had to be changed because they have been disproven.
What else will be discarded when it has been disproven, eh?
It must really bother that more people are even now converting to Catholicism than to any other faith. Green-eyed monster alert.