That's not what I'm saying at all, and it's weird that you've decided to see it that way.
What I'm saying is that the game of D&D defines - and has defined, for literally decades now - certain terms according to certain guidelines. If you choose to reject those definitions, as you have clearly been doing, it seems silly to imagine that the game will continue to function optimally. In other words, you've been told what the game assumes in terms of how hit points work. You have rejected those assumptions, and then complain that in that rejection you have lost immersion. Well of course you have.
I posted in another thread 2E's definition of hit points and OD&D's definition, both of which are not the same as 1E's and are no less valid. Indeed, I'd posit that OD&D's are more definitive, if we're going to play that "Gary said" game. The definition is a combination of luck, skill, endurance, and physical damage. It's always been that way. In fact, since it doesn't list what that portion is at all, everyone along the entire continuum is correct.
it is very possible to play D&D in a way that is contrary to the stated intentions of its design.
I would point you to the descriptions of play sections in the various editions, including the 3.5 DMG (which I read through again last night) that encourages DMs to specifically narrate hits as being hits. Seriously, read it again. Unfortunately, my 1E D&D DMG is in storage, so I can't look through that. But 2E has the same kind of advice. So, tell me again how I'm playing contrary to the intentions.
That's not what the rules say. The rules say that hit points can represent any of those things
I'll stop you there because you're wrong. It doesn't say "can represent." That's your interpretation. It does say that hit points represent all those things, not that it's possible to do so.
Now, you're free to argue that hit points should be physical wounds, but that's a harder argument because there's really no support for it as far as I can tell; it's just an opinion, with nothing concrete in terms of value-added to gameplay that isn't just as adequately applied in the opposite direction.
Again - if you want proof that hits are supposed to be hits, look at the DMG advice on narration, as recently as 3E. Example of Play, page 8 of the 3.5 DMG. And then read through "Describing the Action" starting on page 16.
Look to BD&D the 1978 edition page 7. "[Hit points] represent the amount of damage a character can take...if a character receives a blow, a dice roll will be made to determine the number of damage points inflicted."
And further down the same page when talking about healing, "Otherwise he must continue on in his wounded state until the game is over and he returns to the surface. Each day of rest and recuperation back 'home' will regenerate 1 to 3 of his hit points for the next adventure."
4E DMG, page 22 under the "Narration" headline has this bit of advice - "Instead, use such statistics, along with your knowledge of the scene, to help your narration. If 26 is barely a hit, but the 31 points of damage is a bad wound for the enemy, say: “You swing wildly, and the dragonborn brings his shield up just a second too late. Arrgh! Your blade catches him along the jaw, drawing a deep gash. He staggers!”
We can play quote the books and rules all day, and for every insistence you guys have that hit points never represent wounds and a hit is never a hit, I can find something that says differently.
So, quit telling people who narrate hits as hits that they're playing D&D wrong or not as intended, because as far as I can tell, that's just not the case
even in 4E.