"Roman Catholic dioceses in the country, including the Archdiocese of Philadelphia, and the U.S. Conference of Bishops have pronounced the ordination invalid, saying church law allows only men to become priests."
Not quite.
Church law bars the ordination of women because women, intrinsically, ontologically, cannot receive Holy Orders.
Thus, the Archdiocese of Philadelphia, etc., have pronounced the ordination invalid because ontologically, the woman could not receive Holy Orders.
All I need to read to know this gal doesn't understand at all.