Thanael
Explorer
TIn the vast majority of fantasy fiction with fighter-types as main characters, they violate the laws of physics in the amount of punishment they can take without dying at the very least. Often, they violate it with the offensive capabilities or their agility, as well. That makes them super-human, which is counter to the "Fighters are exceptional, but mundane" line. Even non-fantasy fiction with a fighter-like main character (like Die Hard) have them be super-human by defying the laws of physics in that regard.
No they don't violate the laws of physics. An Action films physics work differently than real world physics. (Though often there are mook rules in place so the protagonist is superhuman compared to mooks)
In a fantasy world there are completely different "physics" at work. In 3.5 there are no mooks rules and a fighter 10 will take a lot of punishment. But so would a commoner 10 with a very high CON (even if not to the same extent). Both are exceptional in that they are higher level than most other people, but neither is really superhuman in the context of the laws of their world.
Perhaps mundane should also be redefined for most fantasy rules sets. I.e. many non- casting classes still get quasi magical/mythical abilities.