I remember playing Ninja Gaiden and having my fair share of problems with the cameras, but I assumed it was Itagaki "genius" simply trying to transcend the ninja experience. You don't need to see your enemy, you need to feel it and react accordingly.

Obiviously they want you to feel the thrill of having Goofy as your camerman on Epic Mickey and they followed the same suit. Remember the motto "isn't a bug, it's a feature"