Christ as the head of the church had to give the church approval by going through Baptism himself to kinda demonstrate that all can come to Him through it
Jesus's baptism was to fulfil the prophecy & to put what you & I could call a stamp on approval for the church .It was also on outward sign that baptism saves an its His
sharing is actually demonstrating love of God and neighbour.The Law and Gospel is fulfilled by this act of love
It doesn't show,may I am lucky that my jobs requires me to write reports honestly