Why is baptism not salvific?

Baptism is not salvific because it does not contribute to or initiate salvation; rather, it is a manifestation of faith and obedience that follows salvation. The essential work for salvation was accomplished by Christ throughHis death, burial, and resurrection. As outlined in 1 Peter 3:21, baptism is described as a 'light figure' or antitype that points to the reality of Christ's saving grace rather than a means to achieve it. It acts as a public confession of faith and an outward sign of an inward change that has already occurred in the believer's heart.