Some of the abuse was well-known at the time. The mistreatment of women and children in Church-run Irish schools and workhouses throughout the 19th and 20th centuries was increasingly well documented by the 1990s. Mass graves were discovered in the 1970s, although in the 1990s the church was still publicly denying any responsibility. Hence Ms. O’Connor’s protest.
I don’t know what Ms. O’Connor knew about the ongoing abuse of children by priests and the church coverup efforts. But I’m sure she wasn’t surprised, as she was well-acquainted with the Church’s perfidy.