Conservatives love talking about pensions funds needing to be solvent for decades...
But there's never a push that insurance companies need to have cash on hand.
They keep their money in investment accounts to make a profit on it, so how much they have varies at any given moment.
When large scale disasters strike and the market is down they're fucked. If they liquidate at the low price not only does it cost them money. At a large enough volume it excarbates the market being down.
Enough insurance claims at once and it could crash the whole economy.
People don't realize how many different ways we're fucked...