You don't understand Colossians 2, where Paul shows us that Baptism is a spiritual baptism.
Remember Paul said "One Baptism?"
That One Baptism is a spiritual baptism, where the water baptism is a visible proof of the spiritual baptism that took place at the very moment of believing in Christ.
It's called the Circumcision Made Without Hands. It's the spiritual operation of God being spiritually baptized into Christ.
Col. 2:11-14
"In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ:
Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead.
And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses;
Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross;
If you like I can go through the Scripture and give you a better undertaking of this. If you are willing to go there with me!
Remember when Jeremiah quoted God, "I will circumcise the heart?"
This is what Paul is explaining in Col. 2, the circumcision of the heart, the one baptism, whereby we enter into the New Covenant with God.