What is it you accepting exactly?
I can 'accept' it in the same way as I could accept someone trying 50 different ways to step through a door; one with a pancake on his head, another time the other jumping backward on one leg, or with one hand holding a sausage and his tongue out of his mouth, until he finally found the best possible way for him to do so, which is with both fingers crossed, jumping on one leg, one hand on top of his head and the other up his butt. I mean, I can accept that this is the best possible way he found to step through a door, you know, the way which gives him the best luck & reduces the risk of aliens or spirits bothering him... But it doesn't really validate the existence of aliens or spirits...
The blind test would at least confirm that he's not wasting his time and money on cables which could in the end do absolutely nothing. And again, we're talking about a cable, one of the simplest and most nondescript feature of a system. I guess it's borderline insanity... Waste so much time, energy and money on something which which might make absolutely no real difference... At least if you bothered to do a blind test and make sure there actually was an audible difference, you would show that you actually cared about it, but when you refuse to do so, well... You're pretty much in denial... I don't know I guess it's common behavior for so many of us, I just can't understand how you can fail so badly at reasoning... "I don't care about the truth I just want to hold on to my beliefs even though they might be wrong." I think they just can't entertain the possibility that they might be wrong. I think that thought is just too scary.
https://www.youtube.com/watch?v=3a3zXJ7biqI