Bloody abstraction...
Which the majority of tabletop RPGs are by their nature. About the only RPG that claimed "realism" was FATAL and that ungodly abomination was about as far from "reality" as a sane mind could get.
But if you're that bent out of shape about it RPGs not being an accurate representation of reality, then I'd suggest finding another hobby, one that won't leave you in such a sour mood all the time.