It does appear as a witness against those who reject the authority of Christ.Luke 7:29
All the people, even the tax collectors, when they heard Jesus’ words, acknowledged that God’s way was right, because they had been baptized by John.
Luke 7:30
But the Pharisees and the experts in the law rejected God’s purpose for themselves, because they had not been baptized by John.)
Doesn't look like a powerless symbol.
The baptism of Jesus in water has no benefit in the matter of salvation. Jesus had no sin of His own.As Our Savior He did so we could die and rise with Him.
We rise with Him because of grace.
For the cause of Christ
Roger