Why isn't a Quad 306 £4000 then? Same parts quality, same reliability, same serviceability, more expensive to make casework, unique and very clever topology...
Why isn't an A&R A60 worth at least as much as an early Nait? Similar circuitry, equally good sound, just as serviceable, similar parts and construction of PCB etc...
Brand mythology created by clever marketing is why. They made ownership feel like joining an exclusive club reserved for "special people" who "get it" and then have the "right" to sneer at non flat earth audiophiles who are to be pitied for failing to "see the light"... such is the proselytising zeal of their apostles that they hardly need to advertise whilst "true believers" consider themselves almost grateful and honoured to be allowed to pay £2000 for a transformer in a box. It's the state of the art.... in marketing