If I can't stay calm and think rapidly under mild social pressure without threat of bodily harm or lost lives, I personally wouldn't feel honest in telling my teammates, "yes, if you or I are in a situation with risk to life or limb, you should trust that I'll handle it appropriately and protect myself and/or you."
Our assumptions about who will succeed in the most difficult situations don't seem to hold up.
My own experience in tall ships and shipyards, where there are plenty of life and death decisions is not that.
There are people that I can fluster easily in a social situation that are perfectly calm and capable in high pressure dangerous situations. There are people that are practically insult comedians that I wouldn’t want driving a car in the same parking lot.
What actually seems to be the common factor is male groups in informal settings
I work in that industry and can say with confidence that statement is false.
Which is a good thing really, because I wouldn't want to think that people were actually determining fitness to be trusted with a soldering iron or embedded systems design based on their witty comebacks or tolerance for jokes about their wife.