Ι have already quoted the relevant studies. You haven’t. Just philosophical views
Yes, but logic tells us that an experiment can be based on a faulty hypothesis and still come up with the right answer*. The results and hypothesis may fail to be successfully extrapolated to all speakers and all rooms, and the others where it seems to 'work' are probably not optimal and could be better.
What should an amplifier do? What should a DAC do? I don't think experiments are needed to show what these should do. I am extending the same logic to saying what a speaker should do. You may call it philosophy.
Do you need to do an experiment to show that an audio system shouldn't shift the pitch of the signal? It is logical that it should not. What will you do if a DBT finds that it should? *Logic* tells you that it may just be the novelty that has caused people to prefer it temporarily, but you would still plough ahead and build it into your DSP system..? That would be cutting your nose off.
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* Neutral speaker in real room gives drooping in-room response, but the listener (being led astray by evolution and philosophy) is hearing the direct sound of the speaker. A non-neutral speaker (dispersion-wise) in a real room needs some baffle step type compensation to sound OK, giving a slightly different in-room response. A correctly set up 'average' speaker in an an average room will give an average drooping response.
Experiment mistakenly assumes that the in-room response alone is what the listener is hearing and duplicates said in-room response using average speaker in average room. Bingo! The listener prefers it! But it was never the in-room response alone that the listener was hearing; it was (ideally) a neutral speaker or, if neutral not available, an average speaker with some EQ compensation for its dispersion deficiencies.
The experiment merely reproduced an 'average' setup. Attempts to duplicate the experiment with other speakers and other rooms would be shoehorning a target in-room response into a system that should have a different in-room response. It may not be miles out, but it's still wrong, and could be set up so much better by doing it 'philosophically'.