I had a similar sentiment when I had to purchase a set of new tires for my car. It is amazing how an assembly of rubber and steel can cost roughly as much as a device that has billions of transistors on it.
Bigger and thinner tires looks ridiculously expensive than it should (as a noob). I don't know the reason, does every tire manufacturers want to earn more from riches (who can buy a car with bigger and thinner tires)? This is important factor when I choose car.