OK465,
Mucking about at 500k, at times hurtling straight at the earth and at times directly toward each other for effect, occasionally even impacting one or the other....
and not wearing a mask is.....risky?
Is it fair to summarise that argument as "small risks are not worth bothering with if there are big, unavoidable risks present"? That goes against a foundation principle of risk management, which is to eliminate risk wherever it is reasonably practicable to do so. It is not reasonably practicable to stop an aerobatic display team from pointing at the ground or at each other from time to time - but there are a whole host of mitigations in place for that, not least training and supervision.
Perhaps the easiest test to apply is the good old CNN test. A Blue Angel has crashed and the pilot is dead. The investigation has been published and a senior naval officer is taking questions at a press conference:
Journalist: So this aircraft hit a seagull, which entered the cockpit, hit the pilot in the face and incapacitated him. Why was he not wearing a mask?
Admiral: Because viewers would not have been able to see his face on the big screens.*
* my supposition.
It wouldn't pass the test, would it? Heads would roll.