Agreed, but not just $1K, marketing, internet hearsay also have similar effects. For example, in the M vs D case, by giving people the DAC filer and HDAM reasons... I can debunk such things by a simple and logical bottleneck analysis, but it won't can't convince fans who don't want to focus on logic, or theories. Ultimately it is their ears that they thought, count, the only that counts in the end.
As I said before, I got audibly better sound quality (sound stage got wider, deeper, crystal clear highs, rich and soft mid to mid highs, punch yet musical bass, more enveloping surround/height effects, etc. etc.) every time after I re-arrange/tidy up wiring clutter, layout, wipe and vacuum etc. I am not kidding!! Fact (to me) is, such cleaning up, tidying up exercise made more obvious difference than swapping out an Denon AVR to Marantz AVP(s), back to Denon AVR, and then to Anthem AVP, or swapping out a HK receiver to cheap Denon AVRs, do separate preamp, dacs, Bryston, Parasound, Hypex, Purifi amps, you name it lol.... We just don't know what others hear, or think they hear period, so it is almost silly to even debate which brand, models sound different, better, worse, same, or similar because people are not going to agree, or convinced one way or another, at least I have never read about any case where a D brand fan managed to convince a M brand fan, or the same with the A brands (Arcam, Anthem) or even vice versa.
In this case, the fact is, it you search on the internet for forum reviews hard enough, you will find a good spectrum of user's preference, those as you alluded to, $1K can do some wonder so it does seem that there are more nicer reviews on products that sell for more, even if they have the same guts, measurements, and in fact for the D vs M, there are more D's that measured better than the M's on ASR, yet it made no difference, there are more nicer subjective reviews for the M's and then people would draw the conclusion that the M brand is better for music (of course
and the cheaper D brand is for movies, when less serious listening is anticipates as emphasis might be on the "effects" and video performance. That's just observed, perceived "facts", not verifiable, measurable facts.