Or to put it differently - if you were the person to manage money with couple commas, you would have done the same.
It is classic prisoner's dilemma. The more there are participants - the less likelihood that everyone will act in a coordinated manner for common benefit. Two persons maybe can call each other and agree, but hundreds/thousands? unlikely
talking - means you can lock out everyone in one room and let them collude. This is not the case here, because the list of depositors at SVB is not public and it takes only a few people to start chain reaction of withdrawals
No I would have immediately had a private candid conversation with someone at the FDIC who would understand.
Anyone who withdrew their money was acting rationally.
There is 0 upside to leaving your money in a bank that is at risk of experiencing a bank run.