The notion that a capacitive switch is somehow expensive to manufacture because the PCB is allegedly "special" (doubt) seems odd to me. All other capacitive sensing stuff uses bog-standard PCBs with nothing special about them at all and it's not like the rubberdome is hard to manufacture either (considering that a more complex kind of rubberdome mat is the centerpiece in cheap rubberdome membrane keyboards). And then…
Because it's a high quality tool, long time ago the US firm IBM made some high quality keyboards too...long time ago.
BTW: I can buy 6 HHKB for 1 Iphone (what is the luxury item here?)