There is no reason why challenging themes and engaging stories have to be mutually exclusive - in fact, each can fuel the other. As a filmmaker, I want to entertain people first and foremost. If out of that comes a greater awareness and understanding of a time or a circumstance, then the hope is that change can happen.
Sometimes when we weep in the movies we weep for ourselves or for a life unlived. Or we even go to the movies because we want to resist the emotion that's there in front of us. I think there is always a catharsis that I look for and that makes the movie experience worthwhile.
Samurai culture did exist really, for hundreds of years and the notion of people trying to create some sort of a moral code, the idea that there existed certain behaviors that could be celebrated and that could be operative in a life.
I have nothing against diamonds, or rubies or emeralds or sapphires. I do object when their acquisition is complicit in the debasement of children or the destruction of a country.