Personally, I think it is weird that they were designed as weapons if they had no intention of the player using them. I suppose it would be to just make them disarmable, but wouldn't it be easier to make them unique cases in a way that doesn't communicate to the player that they might be possibly equipable? Also because they weren't fully programmed to act as weapons a la their weapon class, you could also dual wield the steelwatcher greatswords assuming you had the dual wielding feat.
