So please realise form the point of view of Evangelical chrsitians such as myself, the RCC viewpoints on baptism are wrong, on salvation wrong, as you would deny it being the Cross of chrsit being the source/basis of that, but instead that God dribbles and mediates out towards us by/in the sacraments!
Why is it do hard to accept the great news that God has fully and freely forgiven, justified forever all who call upon jesus, thru faith, and have etrnl life in his name, instead of obligation to this long proces that still has no assurance of being saved in the end?
I think it is worth noting that the relationship between baptism and salvation was so widely accepted and understood even in ancient times that the ancient Adoptionists, who held that Jesus the man "became" God's son at His baptism, likely believed in it as well, it INFORMING their understanding of the meaning of Jesus' baptism. But they looked at the relationship in the wrong direction. They looked at how we become children of God - through water baptism - and reasoned that at His own baptism Christ became the son of God. Whereas the correct understanding was indeed that we become children of God in water baptism because it unites us to Christ in His baptism, which in HIS case, signifies His eternal sonship rather than it being the case that it "starts" it as in Adoptionist thought.
Christians have always interpreted the Bible literally when it declares, "Baptism . . . now saves you, not as a removal of dirt from the body, but as an appeal to God for a clear conscience, through the resurrection of Jesus Christ" (1 Pet. 3:21; cf. Acts 2:38, 22:16, Rom. 6:3–4, Col. 2:11–12). The Baptist's "symbolic" view of baptism is a historical newcomer.
Christians have also always realized that the necessity of water baptism is a normative rather than an absolute necessity. There are exceptions to water baptism: It is possible to be saved through "baptism of blood," martyrdom for Christ, or through "baptism of desire", that is, an explicit or even implicit desire for baptism.
1 John 5 clearly refers to both baptism of water and baptism of blood. The existence of the latter does not call into question the existence of the former. If baptism of blood happens "first" then baptism of water is never going to happen.