It is not perfectly clear.

I could agree with you if you said something like... I trust the engineers and producers to make this music sound it's very best and so I want an accurate system that is not going to change what they made.

What you are saying though, is that your accurate system will make the recording more like the original performance, even though you have no idea what that was. So yes, the signal is so corrupt already that 'corrupting' it more may just undo some of whatever made it less realistic.

For example.... I run a dynamic expander on a lot of my music. I am changing the signal from what is on the CD, yet because they compress most music when recording; it will in fact make it closer to the original un-altered sound. This would show up as being different from the input on a null test and therefore 'worse'. However, it is my opinion that a dynamic range closer to real life makes the music sound more real.