Because if you’re not Born Again, you’re headed to hell.
Baptism doesn’t do anything for anybody - these days it’s nothing more than a ceremony. It’s also considered a work.
If you read Romans 10:9-13, it details exactly what a person must do/believe to be “born again” and be saved.
What does it mean to be a born again Christian?
https://www.gotquestions.org/born-again.html
“Baptism doesn’t do anything for anybody”
Here’s what the Bible says baptism DOES:
Cleanses you from iniquity, gives you a heart of flesh rather that of stone. Ezekiel 36:25-33
Makes you a disciple of Jesus. Matthew 28:19
Gives you the Holy Spirit. John 3:5, Acts 2:38.
Forgives your sins. Acts 2:38
Joins you with the death and resurrection of Jesus. Romans 6:2-5, Colossians 2:12.
Washes the Church and makes her holy. Ephesians 5:25-26
Clothes you in Christ. Galatians 3:27.
Regenerates you. Titus 3:5.
Saves you. 1 Peter 3:21
“It’s also considered a work.”
Indeed, but it’s God’s work, not ours. No human can do the things on the list of what Baptism does.