That's not an accurate summary.
The regulatory regime is one that makes depositors whole when doing otherwise seems likely to cause a major crisis in the banking system. Which we've had for a long time. It merely seems inconsistent because evidence of "likely to cause a major crisis" differs by current possible crisis.
As https://www.bitsaboutmoney.com/archive/banking-in-very-uncer... explains in painful detail, the reasons why they likely concluded that there is systemic risk. But long story short, rising interest rates caused the banking sector to have $620 billion in unrealized losses. Unsurprising since the interest rate rise was *INTENDED* to make people lose money, making money more valuable relative to goods and services, which reduces inflations.
But $620 billion is substantially more than the $130 billion in the FDIC insurance fund. It is substantially less than the $2 trillion in equity in the banking sector, but both losses and equity are unevenly spread. Therefore there are banks under water, and others that are fine. But nobody is sure which are which. And given cash outflows from worried people, we were about to find out the hard way. And once there is a bank panic, even fine banks become not fine.
Like Wile E. Coyote, running off this cliff works fine until you look down. But we've looked down. And now the whole sector needs saving. Thus these actions.
They will go back to normal behavior once the crisis is over.