"High End" audio deserves a bad reputation for lots of reasons, of which this is only one.
The fact of the matter is that even midfi amps, preamps, optical players and wires are essentially sonically transparent. So all there is left to do with them, other than adding euphonic distortions, is to put them into fancier, more robust packages, and then make unfounded claims about their sonic superiority.
The only difference between Harman and some boutique high end brand is that the later might actually believe that all the chunky film caps they stick in theirs has some sonic benefit.
-k