So, if John could do it, then others can do it. Otherwise, you find yourself making an argument that Jesus' own baptism was without merit.
Jesus' baptism, by John, was without merit. Well, not completely, but it was not a Christian baptism. We are born lacking grace in our souls, having no divine spark within. Baptism cleanses us from this congenital condition.
Jesus, being God Himself, had no need for a Baptism in order to become filled with grace. He WAS GOD.
The Baptism of Jesus is one of obedience, and provides an example for us. But it was not an efficacious Christian bpatism.
The people baptised by John did not receive the Holy Spirit and were not cleansed of Original Sin. His baptism was purely symbolic and foreshadowed the Christian efficacious baptism to come.
Jesus did not become holy by His contact with water. Water became Holy by contacting Him.
SD