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.
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!
Or maybe a recession severe enough to drive interest rates back to 1% would also be severe enough to prevent homeowners from paying their mortgages, which wouldn't be great for the valuation of mortgage-backed securities.