Who knows. Unlike Lucci, Kizaru didn't think to himself how lucky he was that he landed on a battleship.
If we're using plot why not also mention how Kizaru got up way before Luffy who even got to eat food but still needed more time to recover which means in a 1v1 with no outside influence Kizaru could've easily killed Luffy a thousand times before he recovered.
Plot truly works in fascinating ways right ?