Of course you're correct, nobody knows the future.
It's possible the $80 billion in mortgage-backed securities they bought yielding 1% and maturing in 10 years might be salvaged. They're now worth far less than they paid because interest rates are up to 5% and nobody wants to buy bonds that yield 1%.
Maybe this receivership will bork a thousand startups, throw a bunch more people out of work, and cascade into a larger recession, driving interest rates back down to 1%, and restoring the value of the mortgage-backed securities, and making the bank solvent again!
Not unless interest rates plummet, no. The bulk of portfolio losses is from long term bonds losing value with the increase in interest rates. Allowing more time to sell doesn’t help you there, especially if you have to pay prevailing interest rates on any delay.
It is not a cold, hard fact that they don't have sufficient assets. It's entirely possible that after liquidating their assets (on the time scale of months), they can make depositors whole even after factoring in the time cost of money.