I was thinking about more extreme change than that to be honest, a really noticeable change in quality of life. I already try not to fly or drive too much.

But even with what you list, external factors based on other people still happen, like your work wants you to fly somewhere, or public transport sucks because everyone else is still driving.

I disagree that we feel like the exception when we're acting like everyone else. We feel like the exception when we're trying to be better and others aren't.