Idk bros. Even with fallouts magical SCIENCE! I just find it hard to believe ol Doc had enough on hand to repair your scrambled noggin and fix your face after being shot twice point blank. Sure it was "only" a 9 mil. Sure, people have survived seemingly impossible shit irl like the pipe brain or failed parachutes when skydiving. We've probably all seen the vid of the nigger who's woman accidentally headshotted him in the car, and he somehow lived.
So there's real world comparisons we can point to, but those situations also didn't rely on a backwoods doctor in a glorified shack who most likely wouldn't have much more than what was necessary for the typical injuries he'd have to treat in Goodsprings. A town where the worst you'd have to deal with is Big-Horner booboos and Gecko bites.
I guess it makes for a fun, logical reason to go for a low INT run but that's as far as my tism will allow me to try to logic the situation away.
Guess those doctor bags and stimpacks really are just that amazing.