With the exception of Southwest, all of the other biggies have gone bankrupt this century already shedding most of the 20th century baggage.

The airlines were finally doing pretty well and Delta last year gave huge profit sharing payouts to all.

The only thing that would prevent bankruptcy is a broad Federal bailout of the industry.

Even if they restored full schedules tomorrow and were allowed to fly everywhere who would go for months?

I flew on Sept 14, 2001 it was a bold step and I stared down every person in the gatehouse looking for a bad guy. I thought the pilots would be locked in the cockpit but rather they to were at the door staring down everyone who boarded the flight.

The only way to stare down the passengers going forward is to have a test certificate. Otherwise, it is a game of roulette.

https://youtu.be/t5kNHiGIKGQ

The islanders don't yet want to play a game of roulette with Passenger arriving constantly on “mine island”.