As discussed previously in posts on this blog, the Sacred Tradition is as important and valid as scripture. The Bible itself is a product of Sacred Tradition, its books having been originally belonging to what is called “oral tradition”. Furthermore, the biblical canon was selected by Pope Damascus I, who rejected multiple other “gospels” which were in use at the time. A large part of the mass comes from the Sacred Tradition. Various creeds come from the Sacred Tradition. The sole definitive source of Christian doctrine for the first one thousand years of Christianity, the bishops of the Catholic Church, had only Sacred Tradition at their disposal until the Synod of Rome in 382. That being said, unless one is to consider all of the first three hundred years of Christianity invalid, we must conclude that the Sacred Tradition is equal to the Sacred Scripture.
The Sacred Tradition found within The Sacrament of Holy Orders
Sacred Tradition in regards to the Sacrament of Holy Orders comes directly from Christ himself. The Catechism explains this rather well.
“Only a baptized man (vir) validly receives sacred ordination.” The Lord Jesus chose men (viri) to form the college of the twelve apostles, and the apostles did the same when they chose collaborators to succeed them in their ministry. The college of bishops, with whom the priests are united in the priesthood, makes the college of the twelve an ever-present and ever-active reality until Christ’s return. The Church recognizes herself to be bound by this choice made by the Lord himself. For this reason the ordination of women is not possible. – 1577, Catechism of the Catholic Church
In summary, we know the ordination of a priestess is a metaphysical impossibility because Christ and his apostles only ordained men. Therefore, a valid ordination cannot be performed on women. The priestess is an inherently pagan (apostate) tradition which the heretical churches have embraced.