There is no world - none - literally no possible universe - that Boeing cannot sell to the government, or that it fails, or that its planes get grounded indefinitely, or anything even remotely close to this outcome.
There are 2 plane makers of appreciable size on earth, Boeing and Airbus. They are essentially government owned enterprises.
Boeing has made a strategic decision and nothing of consequence whatsoever will come of this. Maybe a few people go to jail for a few months. That’s literally it