@icekatze You're forgetting that this is a world of magic and that every time he is beat to a pulp he is getting healed. So there is no "Overuse Injury" occuring.
So, on that point, you're right. It doesn't help anyone in the "Real World"
@Okaariin now that you say it, it's odd indeed because I've checked the raws till ch15 and by the looks of it I was under the impression this was more of a promotional series...