It’s a question of fairness and equality. God wanted both sexes to be equally involved in Life.
The most talked about reason for an all male priesthood is based on God’s sense of Equality and the Complementary roles of male and female.
Humans are made of two ‘parts’ the Body and Spirt, Biology and Ontology
God created females to bear Life Biologically. This is plain to see and no proclaimation of the Church will allow males to bear children. The Church does not have the Authority to change God’s design for Biology.
Males have the ability to bear life Ontologically, via the Eucharist and Absolution. Each sex brings with it the necessary complements for Eternal Life. The female brings forth new life biologically and nurtures it biologically. The male brings forth new Life Ontologically and provides ontologically nutrition.
In this way, God uses male and female equally to bring new souls into existance and into Eternal Life. Equal and complementary
The Church has no more Authority to declare females have the ability to bring forth the Eucharist and Absolve than it would have to declare that men may bear children and nurse.
If the Pope assume Biological Authority he did not have and tried to declare that men could bear children, we would call him a major nutcase, so why not the same of Ontological Authority?