This is pointlessly hostile and counterproductive. They expressed a positive position and intention, which is wildly more just (as in justice) than what we get from the vast majority of producers in any medium, and is ten times more practically significant than whether or not they have a mechanism to prevent false positives from happening even ephemerally.
As far as I can tell, the whole point of the backrooms meme is pointlessly hostile and counterproductive petty arguments about ideas of what "backrooms" means and who owns those ideas.
And yet not even half of what we deserve, which is the neutering of the ability of these automated systems to crush fair use and the enabling of them to actually help small creators who are having their rights trampled.
To parent's point, A24 is expressing respect for the community, but with no further commitment to do anything about it.
We use to point the finger at youtube channels uploading whole movies with a "no copyright intended, this isn't my work" as an expression of no ill intention in the description. I'd see this case as basically equivalent in regards to what they say their intentions are, and what they're actively doing.