I totally agree with you. Some people don not just believe what they are told to believe, but listen.
Do you
just listen, though? Or do you look, as well? Do you know in advance what you're listening to? In which case you
are believing what you're told to believe, by your subconscious, and a mass of inherited preconceptions that no one - not me, not you, not anybody - can avoid.
Ears-only is great, but the "only" part is vital. No looking, no prior information, otherwise the audition process is meaningless. Hard to swallow, I know, but that's human nature. It has been demonstrated over and over and over again.