You are not responsible for American culture. You are responsible for yourself.
So far, these are all excuses. We are not required to buy gas.
We are if we want cities to survive. Look at a major city and how many people commute each morning. They can't all move into the city. There aren't enough places to live. They all can't work within walking distance from their home, there aren't enough places to work.
America isn't setup to run without gas. To do what we do, we are required to buy gas. Where does your food come from? Where does your milk come from? Clothes? Wood? Everything is shipped. Everything needs gas. Even if you're not filling your tank, you're still buying gas indirectly. Every 18-wheeler on the road has a lading ticket in it and at the bottom is a line "Fuel Surcharge".