All the 'black swans" without exception you mentioned were predictable or even predicted.

So the real question is: why were they not acted upon.

It's because our societies are not run by our best and brightest but by extremely mediocre power-hungry people. This is possible because we use a system of governance that is severely flawed. And if we don't want it to kill us we will have to change it. But I doubt that will happen in time.

So until then, enjoy and brace for impact.

PS Nature knows how to survive and invests 3-5 times more in maintaining resilience rather than only striving for efficiency. Watch 21:07 >https://www.youtube.com/watch?v=PiY3s2OglV4