These is what water baptism means:
John 1:29The next day John saw Jesus coming toward him and said, “Look, the Lamb of God, who takes away the sin of the world! 30This is the one I meant when I said, ‘A man who comes after me has surpassed me because he was before me.’ 31I myself did not know him, but the reason I came baptizing with water was that he might be revealed to Israel.”32Then John gave this testimony: “I saw the Spirit come down from heaven as a dove and remain on him.33And I myself did not know him, but the one who sent me to baptize with water told me, ‘The man on whom you see the Spirit come down and remain is the one who will baptize with the Holy Spirit.’ 34I have seen and I testify that this is God’s Chosen One.”
John used water for a specific reason that he was told when he was appointed.