Not only is fining Boeing into failure possible, it would be highly beneficial for the government. Being the biggest creditor, the government would take over the company temporarily. The business itself would continue under government trustee-ship, the only losers would be the shareholders and executives. The government would likely quickly sell off its holding at fire sale prices so new shareholders and executives would take over.

GM was too big too fail, but fail it did in 2009. Boeing could/should be similar.