I understand your concerns, yet at the same time I don't.I'm not reading UF for hard science fiction. I know the science is dependent on unobtainium, handwavium, and made-up, and you've pointed this out more than once to people who didn't recognize this point.
In the same way, WL isn't where I'd expect a realistic examination of internal bleeding, dementia pugilistica, and such. Its roots are clearly in the Cold War spy stories via James Bond; these are tales where people were knocked unconscious with a regularity that the medicine of a few decades later would find distressing.
At the end of the day, it's your process, and there's nothing that requires you to continue if you're uncomfortable with defying that portion of reality. That said, I hope you can find a way to continue; I want to know where the story ends.
Peter Eng
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Insert humorous comment here.