Well, reduced sibilance is an ordinary and desirable thing. A better "audiophile absurdity" example would be $77,000 cables, freezing CDs to improve sound quality, using hospital-grade outlets, cryogenically frozen outlets (lol), the list goes on and on
The "audiophile" attitude is such that that "work" is enjoyment. It's a game, a hobby. I'm not defending the extremes of it, but it's not like these people are miserable, they enjoy doing it even if it rapidly becomes completely insane nonsense entirely detached from reality.