So you trust your ears.
well now, say we are talking about your audio memory of what a violin sounds like.
What do you rate the ability of your system to sound like your obviously trusted audio memory reference of how a violin sounds, in percentage. OK, so you say your system is 95% there.
how much of that 95% is the room
how much of that 95% is the speakers
how much of that 95% is the power amp
how much of that 95% is the pre amp
how much of that 95% is the source
how much of that 95% is the interconnects
how much of that 95% is the power cables
how much of that 95% is the speaker cables
how do you parse it all up, each component you put in your system you hear a difference, and it is always an improvement of every sound if you keep it, OMG.......
Yes, agreed, we can think of all the components being filters of some sort, as in reality they all add or take away something from what they are given, some more or less than others. But, as in my example, if you say your system is producing the sound of a violin at 95% per your ears, against your own internal reference of the sound of a violin, then many audiophiles then say that component 'X' made the violin sound more like a violin.....no, almost never. They attribute depth, width, realism, etc , broad strokes. Sometimes they may mention that the cymbals sound more real now, but does that mean that the clarionet does not sound as real, etc.
Its just extraordinary to say that the violin sounds so much better after replacing "X" when our ears can not tell us the contribution of all those (as you say) lenses to the total end sound. If we cant affix a percentage of meaningful value to what each component (including the room) adds or subtracts from the sound of that violin then our ears as measurement tools are not so good at measuring, and I might be able to easily show you that when you replaced your speakers and now the violin sounds right finally that your lower bass is shot by measurements of the room.
While we can all agree that the violin sounds better now, what has happened to your spouces voice or the kick drum or the cow bell etc. Its too complex a task let alone how your ear/brain and your feelings and emotions at the moment all come into play and sighted bias etc. There are plenty of posts here, including by you that show how our ears can deceive us when we are also using sight and biases that that brings. Our ears can be trusted at any moment as long as we have nothing really to compare them too at the moment, but over the long haul, they don't seem to be consistant. It is probably asking too much of such a complex and variable system to act like a measurement device that is calibrated against a standard that is real and only involves electrical signals in amplitude and phase and frequency.
the simple and clear answer I always come back to these days is if you listen to the same song three times in a row do you hear more on that third listening...of course.