[action]
[That does sound foolish, but it's not the first time he's heard of his previous self's total disregard for his own existence. It's foreign and yet...understandable. The when matters little when you know death is following your footsteps. Perhaps he understands it even more through his experiences in those eight years.]
Using what skills you have at your disposal when needed is part of being a ninja. It's no different than any soldier would do. If efficiency meant a swift kill, then it was the more logical choice.