You sound surprised. Who do you suppose usually absorbs these (theoretical) costs?
No, maybe I should have found some emoji for "jaded." Uncertainty imposed upon airlines--or any business--has a cost, and they pass it on to us. It's an interesting thought that if pandemics and resulting unpredictable shutdowns become more common in the future, airfares might rise to reflect the cost of that uncertainty. More optimistically, maybe this one will teach us how to handle them better.