Question about Mifune's dramatic scene with nurse...

Okay, Mifune gives a long tearful spiel about the battle between his conscience and his desire (the "quiet duel" of the title) to his nurse. As I watched it, I thought, men don't talk like this, especially not Japanese men and especially not to women. They may THINK things like this. And Japanese authors may indeed write these kinds of thoughts in their novels. But it seemed odd for him to be verbalizing all of this to his nurse. I understand that it was the best way for Kurosawa to express these thoughts within the script, but it just struck me as very melodramatic.

Also, while I have you I just wanted to express my annoyance with Mifune's "nobility" in breaking off the marriage and not telling his fiancée about his syphilis so she can find another man and not spend her best years waiting for him to be cured. All very noble, to be sure, but it causes extraordinary pain to the fiancée, Misao, and robs her of the ability to make her own decision about it. He clearly doesn't trust her to make such a decision. It also struck me that his nobility was an act of pure selfishness, something to make him feel better about himself despite the fact that it made HER feel worse.

Any thoughts?

Thanks.