Nowhere does it say baptism is a pledge.
It is purely symbolic.
As for you saying water baptism is not a pledge, it is a pledge, a promise, or if you would like the ESV translation, water baptism is an appeal to God for a good conscience. No matter what translation you use, it is what it is, it is a pledge to God.
New International Version (©1984)
and this water symbolizes baptism that now saves you also--not the removal of dirt from the body but the pledge of a good conscience toward God. It saves you by the resurrection of Jesus Christ,
I could not care less what you think about the NIV.
English Standard Version(©2001)
Baptism, which corresponds to this, now saves you, not as a removal of dirt from the body but as an appeal to God for a good conscience, through the resurrection of Jesus Christ,
Water baptism is something the believer does; water baptism is more dependent upon the believer than the baptizer, as evident is in the fact that John the Baptist baptized Jesus.
Again, water baptism is something centered on the believer.
You only say what some denominations say about water baptism, that it is symbolic, but you can only repeat what you have been told by other men, not considering what the symbol means. You do not seem to be able to explain any further.
Go ahead and try to explain more what the symbol means. Try to explain it without saying it is a vow, a pledge, a promise, a commitment to God that you are dying with Jesus.
Baptism illustrates a believer’s identification with Christ’s death, burial, and resurrection. Our old nature is to die and we are to be “buried with Him through baptism into death.” We are buried with the water, and raised out of the water, raised to “walk in newness of life” (live like Jesus).
Picture how baptism looks…the believer comes to make the pledge to God, to die to the sins of the world; so now standing in the water the believer falls back, as if dead; then, the believer goes under the water, buried; then, the believer rises up out of the water, raises up to live a new life.
Romans explain this perfectly.
Romans 6:4 We were therefore buried with him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life.