I assume that listening to music is in a certain way feeding your ego anyway. Who listens at home to muusic who he doesn't like? Who gives a chance to understand the message of the interpreter instead of just criticizing or judging their performance?

Who will just dedicate time at home only for listening to the music without doing at the same time other activities?

What we hear is the result of different factors one of them is the physical waves that hit our ears and body. The rest of the many factors happen in our body. Two different waves can therefore be percepted "exactly" the same way and two identical waves can be percepted by the same person differently depending on what happens to him in his body.

With this the importance of reproducing exactly the perfection can be very much relativated.

A main factor remains the sound-ambition a person wants.

Depending on this ambition and several other factors like listening experience and habits, there are certain limits in which the characteristics of the sound can change without causing a "negative" feeling.

This is purely personal and might change during the life.

So what bother about other people's Hifi unless you are interested in knowing more about the person?