I will not bore you with a lot about baptism that you already know. Let’s just cut to the chase. God will not become one with a sinner. God has no sin and God hates those who do wrong (Psa 5:5) Could you expect God to become one with someone He hates?
In baptism (done properly) one admits that they are dead in their sins and are buried with Christ. Then they are raised a new person. This new person has yet to sin so he, or she, has no sin. God can become one with this person, because He does not hate them.
That is not to say we will not sin, but when we do God will not abandon us. That is loyalty and God is loyal. It is totally different from becoming one with someone who is hated.
John came with the way to make straight paths for God.
(Isa 40:3 NIV) A voice of one calling: “In the desert prepare the way for the LORD ; make straight in the wilderness a highway for our God. (Mat 3:3 NIV) This is he who was spoken of through the prophet Isaiah: “A voice of one calling in the desert, ‘Prepare the way for the Lord, make straight paths for him.'”
Can you see that baptism makes a way for God to enter a believer?
You can see that baptism is to be buried with Christ and sprinkling is not a proper way to bury anyone. If you were to just sprinkle dirt on a body there would be a terrible stink in a short time and that is the way sprinkling smells to me.
God doesn’t tell a new believer to be baptized, because that would be an illegal command (computer jargon). No one can baptize themselves. He tells those who can carry out the command to do so.
(Mat 28:19&20 NIV) Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age.”
If we did so and taught others too there would be no problems with baptism.
As I see it, No baptism-No Holy Spirit!