This has been Naim's stock reply to any question of the 'why do you do it that way?' type for about 30 years.
The earthing issue discussed on another recent thread is one such issue, there are plenty more.
One that comes to mind concerned the Armageddon power supply for the LP12. Housed in a HiCap sized case the single knob switched the power to the motor on and off, but the Naim logo did not illuminate when on (as it does on all other Naim components of the time).
When asked why there was no illumination to indicate that the unit was on, the answer was, as usual, 'because it sounds better'.
In fact, the real reason was that the Armaggedon was simply a transformer in a box, AC in, AC out, nothing else. There was no rectified power to provide a few DC volts to power the NADI board, an array of Leds tha illuminated the Logo when powered.
Hence no illumination.