High quality sound can be achieved today without being a millionaire. That is especially true when factoring in the used market.
The market has split with far more home theaters being built than audiophile 2 channel systems. I am a dinosaur and prefer great 2 channel sound.
I liken sound systems that cost the price of a house as analogous to the guy who buys a Million dollar car. You are not buying transportation at that point, and the same is true for music.
my take is the companies making $80,000 speakers, amps, etc. will never make money on them in the long run, but having a “Flagship” product is more an exercise in advertising and also letting the engineers have some fun.