[buzen laughs a little at that]

I don't think you have to be altruistic. Not to mention it's hard to be, when you're in battle. [when you fight, you're inherently doing it for something you selfishly believe in - or it may just be for your own life, ahead of everyone else's.]

But if it's to repay debts, and to support those you care about - that's as good a reason as any.