You really want to mindlessly argue, don’t you?
You ignored my lead-in judgment “I have never been impressed with Pierre Sprey’s products,” and conveniently left out my next sentence addressing his power cord “But a great example of a potentially questionable product.” That is, I more agree with you than disagree.
Your first two posts ever in this forum (in this thread, immediately above) suggested the presence of a troll. Your subsequent posts continue to point in this direction.
It is past time to move on. If you do not like Pierre Sprey’s products, do not buy them. If you do not like power cords without UL listing, do not purchase those either. And, ironically, continue to make your own. Or do the dozens of DIY amps, cords, cables, switchers, controllers, etc. in your system all carry a UL listing?
Of course, if you have something else to say about audio, please locate the appropriate forum and post away.
If you are interested only in arguing, please go back to the AVS Forum and argue away. See, e.g., PS Audio says thick AC cords kill treble! a thread you started there just a week ago for this very purpose.