Uh??? SVB failed because they had to sell those bonds early at a loss of 0.75 on the dollar. Did you miss that part?
From memory, the loss was roughly 1% of total deposits.
The bank reported a $1.5 billion profit in 2022 to the SEC, just six weeks before the collapse.
We have ZERO public information about ANY non-performing loans at SBV.
If the SVB loan portfolio is sound, then, the bank was destroyed by panicked depositors.