I’m confused. Please explain.

I own a very nice hand-built acoustic guitar. It's a gorgeous sounding instrument.  

When I listen to my modest system, do I compare its presentation of acoustic guitars to the"live" sound of my Boucher?  No. Never.  Being emotionally and physically engaged by the music is my top priority.

I started out with a cheap transistor radio in bed every night. In my teens,when my love for music exponentially intensified, I had a $99.00 component system. My enjoyment of music is not fundamentally dependant upon sound. I've regularly sat in friend's listening rooms,listening to systems much, much more expensive than mine and my experience of the music is not "better" than when I'm at home. 

I guess this puts me in the "good enough" category. 

@hifiguy42

"I would guess I'm an outlier, but I actually don't enjoy most (in person) live music."

I get it.  At my age, I've discovered that the proximity of the Port-A-Potty(s) is the number one priority for me at live events.  Yes, even higher than sound quality.  The "coolness" of the commemorative T-shirt may be a strong 2nd.

I own a very nice hand-built "boutique" acoustic guitar. It sounds wonderful -- the best by far of the many acoustic and electric guitars I’ve owned in 50 years of playing.

So, it goes without saying that, when I’m listening music, I’m stringently analyzing how well my system presents the sound of acoustic guitars compared to my Boucher.

No.

I don’t expect that of my system and it’s not a problem. I guess I’m firmly in the "good enough" camp.

I suppose, had my exposure to music been on a high-end system from the very beginning, I might believe emotional engagement was a function of sonics but that wasn’t the case. I started with transistor radio and graduated to a $99 component system in high school, by which time music had become a hugely important focus for me (this was before I’d started playing).

I’ve played a classical guitar for a long time, and listened to many.  I know what they sound like, and in different rooms and venues.  As far as I’m concerned, a system that can’t get a guitar to sound real must be all wrong.

If you are familiar with piano, recordings of piano are also great tests, and hard to get right. 

I miss tone controls.  Difficult to play rock as it should be (loud!) in a domestic setting.

I more or less agree with @stuartk, so I should add that no system can fully reproduce the rich tone of fine instruments. But I think sounding “real” is the most basic requirement for a high end system, because I know what real sounds like, and euphonic, or pleasant to listen to, and not irritating, is a close second.
Purely studio productions, you can never know.