This may be an unpopular opinion, but if people believe they can hear a difference in their $1000 cables, and they enjoy purchasing and testing them, I'm inclined to let them enjoy themselves. I have a basic hi-fi setup with rational cables, and enjoy the cost savings, but to each their own.
I feel the same way about wine. At a certain point, it's not really about objective improvements, it's about vibes and lore.
Yes, but there is a negative societal cost to allowing quacks, frauds, and hucksters to exploit the naive.
The vendors of such snake oil often make specific, incorrect claims. Fraud is still fraud, even if the victim enjoys it.
I also don't need to storm these people's homes and tear up their expensive audio setups. Life is hard, and if you find something to enjoy, I'll let you have it.
That said, think there is value in putting out facts that let people make informed decisions and not spend tons of money on things that don't actually work.