the underlying issue was that SVB knew they were f'd and so they were begging VCs to stop taking money out because they knew they couldnt cover and those VCs turned around and pulled money faster, because that is what smart money does.
SVBs bargaining chip was that the VCs wouldnt want the books being opened, which is what happens when the fed takes over, but the VCs called their bluff, because they figured they were well enough insulated from any potential fall out.
this is america, so we have the keating S&L scandal, ltcm, enron, worldcom, countrywide financial, 2008. the game never stops.