Did Noah earn salvation from the flood by building the ark? Who would ask such a question? Building the ark was never about earning anything. Rather, it was simply God telling Noah what to do to be saved from a coming judgment and Noah obeying God because he believed in him. See Genesis 6-8

Did Abraham earn the promises of God because he got up and went where God told him to go? Earn the promises? Who has ever said anything about Abraham earning God’s promises? God had it written down that Abraham obeyed because of the faith he had in him. See Genesis 12

Did Moses earn the water that came from the rock at Horeb? Who would ask that? God provided the water when Moses struck the rock as God told him to do. Like Noah & Abraham, Moses believed God. So out of his faith, Moses struck the rock and God provided water. This is not rocket science. See Exodus 17

Did God come to owe Israel a victory because they walked around Jericho and blew the trumpets like he told them? Don’t be ridiculous. But you and I both know that if they did not walk, did not shout and did not blow those horns, those walls would still be there. What they did, they did by faith in God and God granted the victory. See Joshua 6

Did folks under the Law of Moses earn forgiveness by offering the sacrifices God specified in the Law? I mean the priest did all the work, right? No one can earn forgiveness. It just can’t be done. That has to be a gift. See Leviticus 4

Did God become indebted to Naaman because he dipped himself in the Jordan river seven times? I can do that too; what will it earn me? Nothing, same as it earned Naaman. Yet when Naaman obeyed God’s conditions, God granted healing.
See 2nd Kings 5

Faith in God earns nothing. It is the only response to him that makes sense. Repentance is just me turning from my selfishness. It is an obligation on my part. Confessing Jesus as Lord is simply an open recognition of who he is. How then can allowing someone to plunge me under water and raise me back up by the authority of the Father, Son and Holy Spirit (as Jesus and his apostles taught us to do) be the means by which I can earn anything from God?

It does not border on the ridiculous, it defines it.