"Data indicates that the availability of contraceptives plus the availability of medical counseling reduced abortions."

Drill down to the actual data and you find much less certainty of the connection. From the original Atlantic article: "It's possible that the decline in the abortion rate had nothing to do with Romneycare. In fact, Massachusetts has generally performed fewer abortions every year than the year before it going back to 1991."

This is the classic correlation/causation blunder. Because you want to see the pattern, you see it. 

And that a Catholic publication would contradict Church teaching by promoting contraception is troubling, but not unexpected in this case.