Your argument is that Martin Scorsese criticizing Marvel movies will somehow prevent people from watching Abbas Kiorastami movies. I don't believe this to be the case. I don't believe this to be the case because (a) any hypothetical concrete scenario where this might occur seems fundamentally goofy and implausible (see above) and (b) this is completely orthoganal to the reason Kiarostami even has enough of an American audience to include someone like Scorsese. Like, the only reason people in the States even know who Kiarostami is is because elitist film snobs championed his stuff against Hollywood blockbusters in the 90's.
That's... not my argument at all.
You should maybe read the thread more carefully.
My thing with the MCU is that while there's vision there it's more of a logistical than an artistic one. They're there to get asses in seats and dangle a carrot at the audience to ensure they'll show up next time too. I'd love if for just once Marvel Studios let a director just run wild without needing to put the pieces in place for 17 more movies and end with a green screen punchup or the team fighting a faceless CG alien horde. There's the sense that "okay Winter Soldier is their conspiracy thriller, Homecoming is a high school movie" but they always stop short of embracing those genres by needing to be the other thing.
Like compare a movie like Far From Home to Into the Spider-Verse and you'll see the difference between something trying to dazzle audiences visually and one that's overloaded with franchise planning/padding that it feels like you're watching something more like producers laying their cards down than a great movie in its own right.
But they did let directors run wild, and are doing so much more, recently. See Guardians 1, Guardians 2, as well as Thor Ragnarok and Black Panther. They let those guys do what they envisioned and they turned up the best MCU films. What you're complaining about, ultimately, is the caveat to any sort of Superhero movie. You need to have the big climax, and you'll always get it. But that's not really limited to the Superhero genre, either, see stuff like Star Wars.
You can't compare FFH to Spider-Verse, because that's an entirely different genre, with an entirely different batch of possibilities - They could absoluely have made something Spider-Verse like, but that's not where they want to take the character, and that's okay. We got both, they're not competition.