Savvier investors not prone to uninformed panicking pick up a bunch of bank stocks on the cheap. Nobody else was making the dumb interest rate bets that SVB was.
I think the counter case is investors putting themselves into the shoes of a CFO at a company with >250k in cash. Why would they choose to park it at a regional bank rather than one of the big banks? Sure, FDIC made depositors whole this time, but does it have enough to continue doing that? If not, is there enough political will to push a taxpayer funded bailout through (especially this close to an election year)? And even then, how long would that take?*
*This excludes banks that are primarily dealing in consumer deposits, who I assume will be fine.