I was about to make the same comment and also point out that even int the most un-brainy situations brains help.
I recall a study that showed higher IQ toddlers are less likely to die in an accident. Even in our super child safe words, even with toddlers, brains go a long way.
But then again higher IQ might correlate with higher family income which correlates with more parental attention... that's statistics for you.
Officers and non-commissioned officers made up for about 7% and 20% of war deaths respectively.
So officers made up 27% of deaths there, not a higher percentage.Leading from the front was common, for officers up to the rank of General, because it was the best way of knowing what was going on. There was no "blue force tracker" in those days!)
If you consider the size of the average squad led by these non-coms (certainly larger than 5 people), then 20% of deaths is still probably not too good, but from what I know these people don't lead from behind.