The laugh of absurdity thinking how he overselpt and that he is as insignificant as he is really made this chapter great. Musashi could've just up and walked away since he had an out by luckily oversleeping. You could say that the buddha statues blessed him to see another day and keeping his life. But he can acknowledge that he has free will and will own up to his honor of dying at the hands of his mightiest opponent in Inshun. Let's see this showdown finally!