This is what it boils down to:
. . . this transition, once the gospel has been promulgated, cannot take place without the laver of regeneration or the desire thereof, as it is written: Unless a man is born again of water and the Holy Spirit, he cannot enter the kingdom of God (John 3:5).
As it is written says water and the Holy Spirit, both are needed.
What we are saying:
. . . this transition, once the gospel has been promulgated, cannot take place without water or the desire thereof, as it is written: Unless a man is born again of water and the Holy Spirit, he cannot enter the kingdom of God (John 3:5).
Instead, you are saying:
. . . this transition, once the gospel has been promulgated, cannot take place without the Sacrament of Baptism (with desire included implicitly in that term) or the desire thereof, as it is written: Unless a man is born again of water and the Holy Spirit, he cannot enter the kingdom of God (John 3:5).