That is, as may be. But a lot of people calling themselves Christians have told me that working on faith is the most important thing. Until you have the faith, the works are meaningless. These same people spend a lot of time reaffirming their faith, talking about being with other people to reinforce faith, etc. It is hard to say "Christians don't ..." or "Christians do..." when you have so many that do what "Christian's don't," and don't do what "Christians do." I don't think it is something you can generalize.
Personally, I can't imagine having to work on faith. My faith is solid: that there are objective facts, that the laws of the universe aren't going to change tomorrow, that people can improve themselves as individuals and as a species, that love and friendship is important, that I deserve respect, that others deserve respect until they prove otherwise - all seem self-evident and solid. I don't need to discuss these things endlessly to continue to believe them. I don't have long-term "crises of faith" in what I believe (sure, everyone has a day here and there when everything seems to be falling apart). I can't prove any of those things I believe, but I certainly don't have to work on them. <shrug> It seems a strange thing to me to claim to have faith in something, and then need to reinforce it all the time with others who believe the same. Faith is like breathing - you only notice it under unusual circumstances. It isn't like a vitamin that you have to supplement every day.