You don't buy cars only for their designs. The engine which really is part of what makes the difference (the other one being manufacture material) is patented.

And the GPS system (eg. your Navigator), electronic/computer board, and all this things that make you buy a Mercedes instead of a Hyundai, are patented or at least protected by IP.

Again she is comparing the "appearance" of the utilitarian market, not the engineering part of it. (You can patent and reinforce a new material for t-shirts which is unbreakable).