I agree with your point in general, but in this case specifically I strongly disagree.
The idea worked out by Oppenheim and his colleagues/students is a fairly concrete theory which aims to marry quantum mechanics and general relativity. They're working on a bunch of approaches to turn their model into testable predictions in different regimes.
They have a bunch of different papers with different ways their model could be falsified. None of them are at the level where you could falsify their model with current technology but they're seriously working on the theory required to make their ideas potentially testable.
I went to a talk a couple of years ago at a conference by Oppenheim and he is very clear that what they're looking for is to make concrete predictions which can be tested.
Edit: you can see here for another paper where they try to push their theory towards producing some testable predictions
The idea worked out by Oppenheim and his colleagues/students is a fairly concrete theory which aims to marry quantum mechanics and general relativity. They're working on a bunch of approaches to turn their model into testable predictions in different regimes.
They have a bunch of different papers with different ways their model could be falsified. None of them are at the level where you could falsify their model with current technology but they're seriously working on the theory required to make their ideas potentially testable.
I went to a talk a couple of years ago at a conference by Oppenheim and he is very clear that what they're looking for is to make concrete predictions which can be tested.
Edit: you can see here for another paper where they try to push their theory towards producing some testable predictions
https://arxiv.org/abs/2203.01982