You have found the door for understanding the difference between legalism and grace. It always comes when we realize our own deficiencies and know that everyone deals with it because we are all sinners who fall short of God's demands for righteousness when that achievement is primarily based on human ability.<quoted text>
You are correct. I know various groups and none I know baptizes to be a member of their group. I have heard of such but personally do not know anyone who does this. Most people are baptized for Godly reasons- reasons built upon their understanding that Jesus is the way, the truth, the Life. Please elaborate on your last question- "But REALLY, what are we baptized FOR?"
Here is wiki's definition:
Legalism, in Christian theology, is a usually pejorative term referring to an over-emphasis on discipline of conduct, or legal ideas, usually implying an allegation of misguided rigour, pride, superficiality, the neglect of mercy, and ignorance of the grace of God or emphasizing the letter of law over the spirit. Legalism is alleged against any view that obedience to law, not faith in God's grace, is the pre-eminent principle of redemption.