I'm not sure exactly what you're referring to, but pizza bianca (white pizza) has no tomato sauce and tastes just fine to me.
You're wrong. If it doesn't have tomato sauce, you're DOING IT WRONG. It may taste great to you, but there's no real pizza application there. It isn't valid pizza. You can delude yourself all you want, but if it doesn't involve tomato sauce, it is not pizza.