Lifestyle choices won't affect climate change as long as we keep fueling the machine that's chewing through the resources. "It's the economy, stupid" - the modern economy doesn't just depend on consuming many resources as possible, its tenets are fundamentally based around it. Every call for more jobs is a call for more waste. Every push to lower interest rates is a judgment of valuing the present over the future. We've figured out how to make more stuff than we can actually ever use - now we need to figure out how to dial it back instead of throwing the excess away.
It's also important to you because it can help you decide where to work, where to live, and what to do.
I'd argue that the overriding moderator is culture, with global warming being much more inconvenient for the car-based consumption treadmill.
> There is a reason the rest of the world (in places with worse problems than in USA)
It's not about real problems that people directly struggle with, but rather political "problems" that mass media turns into a divisive frenzy.