They also remind me on how ignorant we all are/were. Now "simply" stopping high energy consumption is not enough anymore.
Perhaps SpaceX-Musk is right in what he does, although Mars makes a terrible home.
It might be extremely uncomfortable. Billions of people might die. Civilization could collapse utterly.
But it's still going to have more oxygen, better temperatures, and more resources than Mars.
There can be good reasons to go to Mars, but a "backup planet" just isn't really a good one. If all we care about is the survival of the human race, it's really not in jeopardy. Certainly not from climate change, and not even from a war, asteroid, or pandemic.
I'm not supportive of any billionaire much less the ones actively corrupting democracies. But that doesn't mean that they won't cause historical things to happen.