When giving directions for a road-trip, people sometimes leave off important steps. Anyone who follows those faulty directions is liable to be lost, and end up at the wrong destination.
If we’ll follow divinely-inspired directions, we know we’ll end up at the right place. :-)
Baptism is a public confession, in and of itself it does not convey salvation. Only the sacrifice Jesus Christ made to pay the penalty for our sins and redeem us is sufficient.