Honestly, props to you and your processes and plans.
And you are correct, that not EVERY American consumes more resources. It only takes one counterexample to prove that wrong. However, the parent of my post wrote something about "a lower class american", and so I was attempting to indicate that the condition is not confined only to lower-class Americans.
Per capita, the USA is one of the biggest consumers of resources in the world. As you say, driving is a big factor. Another is that we eat much more. Averaged over the whole population, it means "americans" consume a lot. Heck, that is PART of the reason why there is a trade imbalance between USA and China. (The other big reason is greed, and I think you know that already.)