Despite the huge subsidies given to airlines after 9/11, and the waiver of liability, some airlines still did not survive it, or recover from it.
United filed in late 2002, Sabena, Sun Country, Midway and National filed and stopped operating, airlines like Aloha, VASP, Swissair, Northwest, Delta, Air Canada, USAir, Hawaiian, Ansett, and Alitalia couldn’t recover and eventually filed, and dozens of smaller airlines folded.
Somehow I don’t see West Africa having the same effect as our lockdown.
On the other hand I took a look and round trips to Liberia are now $4,000 to $8,000, for ECONOMY. So you have a point, there are some BIG BUCKS out there by flying to Monrovia, at least.