Sin is a problem for the sinner. The Church and her pope offer healing.
Unless you include profanity, we don't see much blasphemy outside mental patients.
Sacrilige is rare unless you misread Corinthians, which you must do, because the term "mortal sin" as we know it and confess it did not exist in the early Pauline church. Indeed, confession was to a fellow Brother, not to a priest (there were none). Apostacy (the real kind, where you denied Christ to the Romans) was the most common such sin, but the translation made by Wills shows that chapter had more to do with bringing food to the Agape meal and not sharing. And yes, I trust Garry Wills more than you. Garry went to primary school with my mother-in-law and led her brother into the Jesuits.