Did SVB lose money and made bad bets? Yes. Could they have raised back money by selling shares and return to solid ground? Also probably yes.
What made this completely fatal is their client base. Client base which are supposed to be the biggest risk takers in the economy. Fled away at record speed. The burners of billions of dollars, fled away from quite moderate risk bank (moderate relative to their own risk profiles). That has been there for 40 years.
It's not people who are unfamiliar with raising money. It's not your common people who somehow started a bank run.
It's a small and connected group, that could communicate exaggerated risk to everyone and flee at record speed. Which is why I don't buy their innocent claims at all.
It's actually hilarious that people who were selling sham crypto for billions of dollars got spooked by a bank. As depositors. It's like they projected their own insecurities and grift and fled like they saw their own scam and found themselves in it.