Cconfused...

Since this was my quote I’d like to disagree with accuracy and realism being the same. This is particularly true when music isn’t being played back at ear bleeding volumes. A great example is the upright bass. If you’ve ever heard a bass in person, it has a particular sound quality even at lower volumes and you can feel a thump in your chest. Most systems I hear that are neutral (for instance Wilson speakers with Spectral electronics) don’t provide this energy at reasonable volumes. 
Most systems I’ve heard that are very high end (over 200k) lack emotional connection for me. I perform music professionally so I know what real instruments sound like when live. This is similar to why many people prefer tube gear. For vocals, tubes can (but don’t always) add just a little color that to me makes the voice sound more real and less like a recorded and reproduced version of the same thing. 

fwiw I made the original comment to make sure it was understood that I was ok with slightly colored sounds, such as warmth. It’s not like I was referring to some crazy difference. I find the difference between speakers far greater than the difference between amp, which is what the comment was about. 

We could focus on other instruments that often sound weak even on very expensive setups. Timpani is one. Trombone. If you’ve ever had the pleasure of hearing a great trombone player in person, especially an orchestral one, you’ll know there is this presence to the sound that wraps around you. There is a heavy core (fundamental) in the mid bass with overtones that add sparkle.