Well, first of all, glass is used in a great many automotive structural parts. Second, you seem to be suggesting that God is nothing more than a lazy (or at least unimaginative) shop mechanic? Kind of demeaning for the omnipotent master of the universe, isn't it?
Not at all. I'm saying that a creator with intelligence and abilities beyond what we can imagine created a universe that is also beyond what we can imagine. He chose what He created and how it was created. To use the same basic design to make an elephant, a bat, a whale, and a lizard to me shows wondrous imagination and creativity.