This is mostly caused by panic, not reality. If people didn't panic about SVB eating a loss, even it wouldn't have likely failed
That's not "reality" though. The phenomenon of people "panicking" (ie acting sensibly when their savings are at risk and getting them out while they still can) is a fundamental part of the crisis-process of any bank when it is badly managed.
Saying "well if people just ignored history and group psychology and hope nothing bad will happen and risk all their savings by doing nothing, then nothing bad will happen" just isn't remotely realistic.