I notice that, when you become engaged in a debate, you tend to get snarky with people as time goes on. I suppose that's true for a lot of people, but it makes what would otherwise be a friendly debate rather unpleasant. If you find yourself making expressions like this one, maybe stop and ask yourself if you're making a constructive contribution to the thread.
What makes me a little snarky is someone talking as if from a position of knowledge, who in fact is unfamiliar with the most basic features of what they're talking about.
I'm not saying that there's anything wrong with ignorance, particularly in relation to trivial matters such as RPG rule sets. But I'm surprised to see bold, confident assertions being made from a position of ignorance.
Okay, but is that the case for every fighter PC in every 4E game? And why is it that such a character is always a PC and not an NPC?
PC or NPC is not a property of a character in the fiction. It's a description of who among the game participants owns/controls a character. So the real question is
Why do the players get to control the implacable warriors, while the GM is stuck controlling the sea of mediocrities? And the answer is because - as per the blurb on the back of the PHB, THE WORLD NEEDS HEROES, a premise of the game is that the players control the protagonists.
There is indeed a narrative disconnect in one person in the entire game world operating by special rules that apply to literally no one else.
The character operates under the same "rules" as everyone else: they draw their sword (or whatever) and engage their foes in melee. They just happen to be implacable, relentless, remorseless, however exactly you wish to characterise it. Like Conan, or Eomer, or Aragorn, or Lancelot.
To me, it seems like complaining that (say) Cathy Freeman (Olympic 400m, Sydney 2000) or Gary Kasparov (champion chess player) or Rasputin (notoriously hard to kill) doesn't operate under the same rules as everyone else.
The idea such a character does not and cannot ever miss an enemy, no matter what the circumstances are – or regardless of how badly they fail an attack roll – can be legitimately described as a disconnect between what the mechanics are telling us and what the fiction is indicating, because other characters do miss on the same die roll values; and yet that's resolved because...the PC has a power that no one else in all the world has? Nowhere did Tolkien, Howard, Mallory, etc. write that their characters would forever strike true simply because of who they were (at least, not that I'm aware).
Conan always strikes true. He kills were-hyenas by punching them through the skull. Lancelot defeats whatever knight he jousts! Aragorn and Eomer meet on the field of battle, having cut their way through a sea of Orcs.
You are imposing an a priori conception of what the mechanics
must mean, and then complaining that the fiction doesn't match that conception. And you're correct, it doesn't. So perhaps you shouldn't play 4e. But I can report from experience that I had no trouble understanding how the mechanics and the fiction relate - even though for the previous 19 years my main game had been Rolemaster, which has a completely different way of relating mechanics and fiction (and would have no room, either mechanically or conceptually, for "damage on a miss").