What that employee is referring to, and it is a great employee quote, is the fact that SVB's unexpected announcement that it was selling HTM securities at a loss and publicly raising equity is the singular event that really triggered the whole crisis. The CEO's poorly calibrated communication and lack of action in the midst of a run on his bank had sealed the bank's fate by Thursday afternoon.
The point this employee is making is that instead of this kind of "Boy Scout" transparency about its efforts to shore up its balance sheet (which only served to cause panic), the CEO should have quickly and privately closed a deal to raise capital only announced the deal after it was done. I don't know if doing a deal with a Middle Eastern Sovereign Wealth Fund would have helped avoid an accidental panic. But they could have very easily sold SVB to a larger bank before the CEO's own-goal of causing a run on his bank by announcing forced selling of bonds at a loss and a public capital raise. Once the bank run had begun, it was impossible for a buyer to step in.
I believe that it must have been greed and overconfidence at the core of their problems. They didn't want to hedge their IR exposures, didn't want the expense of raising capital quietly, didn't want the expense of diversifying their funding sources away from volatile depositors, etc.