I can at least understand the need for kinetic weapons. I was watching a recent Enterprise episode (Rajiin) where some enemy troops boarded the ship. The crew were trying to repel boarders but apparently the guys were wearing some type of armor that was impervious or at least absorbed all the laser fire. I thought that if they had some good ole fashioned slugthrowers, those boarders would be seriously ventilated.
And of course in traditional Trek fashion, no one had helmets on; but I won't go there.
zen