The foolery criticized by some people in this threads is then the search for a better sound goes into unscientific and esoteric areas.
I love a good meal and try to improve my cooking, but I would never “improve” the electric circuits in my kitchen with the expection that my meals will taste better afterwards. That would be foolery.
Funny thing: I found this post I posted 4 years ago. After reading this thread, I think I should have started that business. Too bad I am not conscience-proof enough to do that. 4 years ago it was a joke about something so far fetched as possible, but now …