If airlines remain operational then they will need Boeing. There is nobody else with the capacity to build aircraft into the future. The other main player, Airbus couldn't meet their own demand prior to the Covid thing, and that situation will return. 
The world will change as a result of this, of that I have no doubt. The US will demand that manufacturing will return home, particularly in essential areas such as pharmaceuticals. (They'd be stupid not to, as China now manufacture around 90% of antibiotics, and therefore have a huge lever to pull in times like this). Borders that are closing will likely remain so, particularly in the US. But international travel will resume. 
The US will not allow Boeing to fail, it is far too important to them. Boeing has brought massive prestige to the US, and it is indeed still the largest manufacturer of domestic airliners, although Airbus beat it in deliveries in 2019, for obvious reasons. The 737 Max was/is a PR disaster no doubt, but it is only one of the many types built successfully by Boeing. Air Force One will NEVER be an Airbus, Bombardier, Embraer or Tupolev. It certainly won't be a Comac.
Here is an excellent analysis, albeit pre Covid. 
Better Buy: Boeing vs. Airbus | The Motley Fool
Bookmarks