Take your pick of the following possibilities:
1. You're not hearing much of a difference in a component that someone else swears by. The other person's a priori assumption is there is something wrong with you or your system.
2. Whatever characteristic a component has is offset by an inverse quality elsewhere in a system or otherwise masked.
3. Your priorities as to what's important in music reproduction aren't in the same order as the other person's.
Ultimately, the whole point of a stereo system is to play back recorded music in a manner that allows you to suspend your disbelief and imagine you are hearing a real performance (or what was intended to be heard by the artist.) There are many paths to that place, grasshopper. ;-)
1. You're not hearing much of a difference in a component that someone else swears by. The other person's a priori assumption is there is something wrong with you or your system.
2. Whatever characteristic a component has is offset by an inverse quality elsewhere in a system or otherwise masked.
3. Your priorities as to what's important in music reproduction aren't in the same order as the other person's.
Ultimately, the whole point of a stereo system is to play back recorded music in a manner that allows you to suspend your disbelief and imagine you are hearing a real performance (or what was intended to be heard by the artist.) There are many paths to that place, grasshopper. ;-)