Yes, like I said, I was playing devil's advocate. But I would be willing to bet you own a car and it's a significant part of your lifestyle. And if you don't I'd still take that bet with every adult I talk to and come out ahead. I'm also willing to bet that your car has a negative impact on your health and the environment (from the atmosphere to the planning of your city).

My point is that world changing inventions do occur (rarely) and they are met with skepticism.