Acknowledging that other people may judge it different does count. With that acknowledgement, you are quite simply not declaring one way to be true and all others to be false. It doesn't matter if "of course other people would judge it differently."
Take the Earth. It's round. This is a fact. And "of course other people will judge it differently." We call those people Flat Earthers. Even with facts you will have "of course other people will judge it differently."
You realize that in this case comparing Oofta to a Flat Earther is far from complimentary, and that people tell Flat Earthers they are wrong
constantly.
Those are too easy. What about Tunnels and Trolls or Warhammer Fantasy Roleplay? Are those D&D? Because if they aren't, then there comes a point where if enough rules change, D&D ceases to be D&D and becomes a different game.
Okay, let me play this out just for laughs and giggles.
Hack and Slash, Megadungeon play, with few or no NPCs. Let us set the DM issue aside, as I did in the post where Oofta declared this style of play "Not DnD" (because yes, I did set it aside. I had already shown this style could work without a DM, and was told this style was not DnD and that was what I was defending in that post)
What rules are we changing?
Still rolling the same dice.
Still making characters using race, Class, Background.
Health, Class abilities and AC are unchanged.
Skill Check rules are unchanged.
Monster statblocks from the Monster Manual, as they generally are
Still using the DMG to adjudicate stone, wood, ect.
Still using all the spells in the PHB, though some are obviously less useful without NPCs.
Sure, there are plenty of rules we aren't using.... but no rules were changed. So if we are playing DnD, using DnD rules, why isn't it DnD?