Good point, Crowns&Laurels.
The irony is that the Baptists who, on the one hand seem to hold a low view of baptism, actually make it a much higher bar to jump for membership. Because they believe baptism is an ordinance rather than a sacrament, they can tend to make baptism into a work. At least that's what I've come across at the Baptist churches I've attended. They don't consciencely do this, of course, but if you read the language in their baptismal statements, it's there.
The language that is used in describing baptism in the Baptist churches I've attended is all about what the believer does. It's all about the believer's "obedience" and "public profession of faith" or, "following the example of Jesus". I've heard pastors challenge people to be baptized with, "If you are serious about your commitment to the Lord. . ." IMO, this is backward thinking.
Looking at the Great Commission, it is clear that Baptism is something that is done *to* you, not *by* you. Also, baptism is about what Christ has done in obedience for you, not what you do in obedience for Him. According to the text, the only obedience in question is the obedience of the baptizer not the baptizee. “Go therefore and make disciples of all nations, baptizing them. . ."
I may be slightly derailing this thread, which I apologize for, but I think this helps further explain the why.