Why should we be baptized?
It is a command from the Lord:
Matt 28:19-20 “Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you...”
Anyone who has experienced God’s grace in salvation, should automatically respond with a desire to obey his commands. Thus, every true believer should naturally want to be baptized. So while baptism is not necessary for salvation, their experience would be questionable if a person claiming to believe refused to be baptized.