Road wear is almost 100% weather.
Horseshit. I'm not gonna look it up for you, but the worst roads in the country are in the bay area, where most years they get nothing more harsh than a gentle drizzle. The roads do get pounded by lots of heavy trucks, and the legendary car-destroying potholes make the news constantly.
The wear comes from compressive forces from heavy vehicles. Look it up, and learn.
Never call a man a fool. Borrow from him.