I agree with you, but you fail to understand that a Yellowstone eruption would devastate some of the most conservative areas of the nation, leaving the west and east coasts unaffected.....all those liberals would have a massive majority.
It would impact the main food production area of the US.
The West and East coasts would suddenly find themselves being unable to afford feeding their underclass populations.
I know quite well who lives in the areas of the country that would be most devastated by an eruption. My point is that leftism is a luxury exercised by people who have never had to develop real survival skills. In the case where they would be in a fight for survival, the useless leftists would either die or switch to survival mode. And once in survival mode, those leftist attitudes cannot persist.
How would a rich but useless leftist like Nancy Pelosi survive and keep an iron grip on power when her money is useless and she has no skills? How would poor leftists who are willing enough to submit to power survive when the rich leftists who have made them dependent for so long can no longer confiscate enough from working people to feed and clothe them?
There are many leftist fantastical beliefs that simply would not stand up when the reality of survival rears its head.