None that I found say what you claim they say, including probably the most well known take on the OSR: Matt Finch's Primer. Neither does Ben from the Questing Beast say the OSR is like what you're saying
So do you have any links where people are claiming the OSR does what you're claiming it does? you said "nearly every one", so I imagine it should be easy. Cuz the most well known sources don't say any of that.
I have a lot of respect for both those guys. I watch all of Ben's videos, Finch's Swords & Wizardry is my go-to OSR game.
But a new gamer doesn't need someone to tell them how the game should be played. Looking at a character sheet where a fighter has on average 4-5 hp, +1 to hit, etc., you just know that you're not going to last long against a kobold or goblin that has basically the same stats as you do. Put in a group of them that is roughly the same number as the party, and that front line is going to drop. One hit, more than likely, is going to permanently end the adventure for a character.
And what happens when you end the adventure for a character or two, especially your frontline? That ends the adventure, at least until you return to town, make up new characters, then return to the dungeon. Just like that - you've wasted probably an hour of game time. And that's not fun for most players.
What else isn't fun? Trying to avoid that fight with the kobolds by sneaking past (if it's even possible - but it's statistically unlikely RAW). And then you get into a room with giant rats that you have to sneak past or distract with some cheese. And then you get into a room with skeletons that you can make run away with a turn undead (if you're lucky). And then you get into another room with kobolds that you have to sneak past. Repeat, ad nauseum.
Don't misunderstand me. I do love TSR-era D&D and OSR games. I just think they are presented in the worst possible light. The rules are bad. The fans of the games (and I'm on Discord channels for these companies) all know that the rules aren't great - they rely almost totally on the judgement of the GM or referee. Any OSR fan will tell you that it's down to the judgement.
So what OSR needs is a book that cuts through the crap, presents the game as a GM should run it, not just "please ignore these rules and run a game that's fun" (which is the mantra of most of the systems).