I find that many raised with the Protestant Theology of "saved by faith alone" tend to want to disregard anything that Man has to do. We are saved not by anything we do, they say.
Though I think they have it right that we can't save ourselves, that only Christ saved us, I think they become virtually "lawless" in their theology if they wish to discard human works apart from the matter of earning Salvation. Clearly, we are commanded to accept Christ as our Savior, and we are commanded to follow him as Lord and to obey his commandments.
Some of these people will not respond to any arguments contrary to their insistence that "only Christ can do good," and "only Christ can save us." I would not worry too much about them. See Antinomianism.