User blog comment:Kogath/Monster Hunter X Discussion/@comment-20010297-20150909201359/@comment-25275196-20150910104319

It was the setting of the fight, Lao is so powerful that he doesn't care that you are attacking it, he just keeps going, he doesn't see you as a threat, and so doesn't pay you any attention at all. You weren't ever trying to kill Lao, you were the as the forts last resort, and must defend it at all costs, if you want to fight a Lao that pays attention to you, go fight a hacked akantor that was made large.