This may help...
At the end of the day you have to either accept that if i can hear no difference, then while there may indeed be one, maybe i have no need of paying for something that i cannot hear.
I trust my ears and my senses... i do not trust my biases.
i just added vinyl to my home setup. now my home setup is a Sony all in one cd uner tape thing that my wife bought ten years or more ago. the record player is an ION USB turntable (analog out to the phone in with regular RCA cords) speakers are (at the moment) a pair of JBL control 25's. (there is a much better system in the garage that has just not been hooked up.)
So i think we can agree that i have no business on this part of the forum ok...
HOWEVER, when i am listening to the vinyl, i would SWEAR that it sounds much better than an equivalent CD. but the reality is that there is no way in hell that is the case.
But my BIAS tells me it is better. even though i will argue all day that a CD has more accurate info that is more accurately presented through a competent system.
So while the conditions in some tests can cause fatigue and make you uncomfortable so that you dont trust yourself and you overthink... etc, etc, etc. at the end of the day, we have to find some way to do a test where our biases are mitigated as mush as we can easily do so... and a DBT (in some fashion) is the only real way we can do so.