It's often >90 degrees Fahrenheit at night in for months on end where I live, and houses are built cheaply and in a style completely unfitting a hot climate (that is, thin walls, dark roofs, fully aboveground, thoughtless window placement, etc. Standard American Dumbass style). It's unhealthy to sleep in these conditions without AC, even fatal for some.

So yes, we could survive without power at night. We just have to rebuild every building.

As a long-term ideal I don't disagree with you. We should be building for resilience. But that's not a solution to climate change.