Even if that would be the case, all it takes is one person that believes they can hear a difference and actually proves they can do it in a proper double-blind. For some reason we don't seem to see that happening....
There many male egos in this world that cannot tolerate having their "beliefs" challenged. And the percentage of such egos among audiophiles seems to be higher than in the general population.
I am amused by the presence and adamant defensive posturing of the subjectivist posters in this thread, a discussion that was started in order to understand how to deal with people spouting easily disprovable (via science and controlled testing ) "beliefs".
I find it fascinating that even some people who have a strong background in science can so easily ignore reality to deny evidence-supported findings that have repeatedly been confirmed. In audio I see strong instances of denial similar as with AGW/CC (Anthropogenic Global Warming and the rapid global Climate Changes that it is causing).
However, with AGW/CC there is an existential threat to our modern technological civilization. Such is not the case with audio, where ego-bruising and loss of pride is the only danger.