A small impact is still an impact. Think of it like this: Getting rid of your car will have a very small impact, enough to the point to be impractical in car-centric cities. But if the city redesigns their roads to prioritize foot and bike traffic to destinations, then thousands of people no longer need a car and it has a bigger impact. Now imagine that an entire state sees that positive change was successful, they can institute sweeping changes that will have an impact far greater than any city. The luxury fashion is the city, and mass production is the state.