Makoto Fujimura is a gift to the church. He is now on my must read list. I do not particularly need to be convinced of the basic argument in Culture Care, culture matters. But the framing of culture in similar terms to environmental care I think makes a lot of sense in helping the reader to understand that culture is neither static nor inherently good or bad.
Culture is cultivated and if we want a culture that reflects truth and beauty need to have Christians that understand truth and beauty creating to influence culture. Fujimura starts with the assumption that Christians should be interacting with culture and creating. He is not particularly interested in creating culture where Christian is used as an adjective (Christian music, Christian movies, etc.).