Absolutely we all need to do more.
I'm hoping that's what will bring the world together. I know that despite China-US tensions, the two are back committed to climate cooperation and such. So maybe competition, especially in the developing world, will help.
Developing countries could benefit from expertise (in developing renewable infrastructure, public transit, climate-friendly lifestyles, etc).
That's at least what I'm hoping for.
To yours and Ian's points, there could be a midpoint of sorts for everyone, and that's probably the best case.