Also doesn't the proposition that the act of designing/conducting some experiment and the noise generated by some events that took place in past (but can't be classically observed at the moment of conducting the experiment because the light generated by those events didn't reach the location of the experiment before the moment of finishing the experiment) cannot be correlated contradicts the non-locality of quantum mechanics?
NEW RESULTS! Cosmic Quantum Bell Test https://www.youtube.com/watch?v=i6WxIblKVZI
And the experiment mentioned in your link confirms this non-locality up to the distances of 600 light years, but we want to confirm it for even larger distances and times, that's why there is a need for techniques like the subject of this discussion.