The at risk banks have all reported a 50% or higher ratio of uninsured deposits to total deposits. Basically, they simply do not have the hard currency to shell out in the event of a panic.
The two things are totally unrelated. Whether the depositor gets paid or not from deposit insurance has nothing to do with cash on hand.
And didn't the SVB bailout of the tech billionaires show that all deposits are covered if the right person is the depositor.
All animals are equal, however some are more equal than others.