Agreed.
Nothing of value can be created without energy. Therefore the entire global economy runs not on finance, but on energy. This is now clear to most thinking people (i.e. not to politicians or conventional economists).
A lifestyle similar to that of the 1930s should be sustainable. Must less car ownership, hardly any flying, a simpler and less consumerist lifestyle. I don't recall my grandparents being desperately unhappy with their lot back then. They never owned a car.
If humans can't accept that need for simplicity - if we keep hankering after hyper-mobility, and regard the glossy-magazine lifestyle as our birthright, then we can look forward to climate breakdown and its consequences: mass migration and conflict. We downsize voluntarily, or nature will do it to us. And the latter won't be pretty.
There's not much that folks on the breadline can do, but those of us with a comfortable lifestyle can and should get started. I've given up flying, full stop. Every day our 15 year-old car stays in the garage is a good day. We grow as much of our own food as we can, and we mend and repair appliances, clothes, and other goods. We're setting up a simple rainwater harvesting system for the garden
And that's still not enough; but it's a start.