Very interesting, what does it have to do with my complete post?
Jerry's comment did address your complete post (as I read them). One component of his statement is that we commonly rely on critical listening – every single one of us. Going back in time, that will be a consistent feature – as it is for most animals. Discernment of sounds is a life or death matter, ergo it is built into the organism – we are 'designed' for it. Humans, by virtue of our radical cultural evolution, have pressed that capacity into a broad spectrum of learned talents.
We are a musical species. In one form or another, it is ubiquitous. Largely, differences in critical listening ability derive from differences of exposure – to the act as well as to the cultural memes.
Another point Jerry made is that critical listening does not happen by brunt of force. In fact, I would argue that critical listening by brunt of force is the best mechanism for introducing confirmation bias. Listening should be a relaxed activity – as passive as possible. We are a creative species. That applies to our experience of what we sense – it is a creative process. The more one dissects by intellect, the stronger the influence of one's knowledge. This is at the heart of the brain's marvelous efficiency. It is the essence of efficient decision making. It is at the core of 'unreasoned' feeling – without our awareness. This fact has equal power to enable us to know what's wrong under the hood of our car as it does to abet our imagination in A/B audio comparisons.
My point in the forgoing paragraph is that critical listening has
much to do with learning, but when its exercise is 'work', it is circumspect. Learning makes it second nature, like hitting a golf ball. Take dissectional thought to the golf course and watch your game go to hell. So I suspect it is for critical listening. Once one knows 'where' to listen, it just happens. Perhaps, another analogy would be with seeing the 'hidden' form in those hidden image stereograms - once one sees the sailboat, it's practically impossible not to see it. What do you tell your friend who is standing there 'trying' to see it? Relax.
I hope I didn't miss the crux of Jerry's comments too badly.