Ever wonder how we see black on a white projection screen? You could say it is confirmation bias. The brighter the projector and the darker the room, the blacker blacks look on the screen, The white screen has become the darkest surface in the room. We can listen to music on an AM car radio (back in the day, the 1960s) and appreciate the song even through the static. FM radio in the 70s sounded much better- confirmation bias? Sure it was but powerful enough to leave AM radio in the dust. Same with the growth of cassettes in cars and then CDs.
Our senses are comparative. Confirmation bias is a part of life. Embrace it. It’s not a bad thing. When your system sounds better, enjoy it. Wondering if the expense of a new gadget is worth it? Put the old gadget back in. If the old gadget sounds as good as the new one, great. Save yourself some money. But why treat people with disdain for enjoying their systems? “Illogical”, says Mr. Spock. Yes, I like the Original series the best. Confirmation bias because that’s what I grew up with? Probably.