Bishop Barron explained it best.
He said that the feminist today demanding ordination of women, see the priesthood
as a position of power and they want that power.
The fact is, the priesthood is a vocation of service in which only a man can serve. It's
becoming Christ en persona on the altar at Mass. It's Christ en persona hearing confessions
or ministering the sacraments to the sick and dying.
CCC
1577 "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.
875 "How are they to believe in him of whom they have never heard? And how are they to hear without a preacher? And how can men preach unless they are sent?"390 No one - no individual and no community - can proclaim the Gospel to himself: "Faith comes from what is heard."391 No one can give himself the mandate and the mission to proclaim the Gospel. The one sent by the Lord does not speak and act on his own authority, but by virtue of Christ's authority; not as a member of the community, but speaking to it in the name of Christ. No one can bestow grace on himself; it must be given and offered.
This fact presupposes ministers of grace, authorized and empowered by Christ. From him, bishops and priests receive the mission and faculty ("the sacred power") to act in persona Christi Capitis; deacons receive the strength to serve the people of God in the
diaconia of liturgy, word and charity, in communion with the bishop and his presbyterate. The ministry in which Christ's emissaries do and give by God's grace what they cannot do and give by their own powers, is called a "sacrament" by the Church's tradition. Indeed, the ministry of the Church is conferred by a special sacrament.