I completely concur TWB. Indeed, via my previous communications with Dr. West he explicitly advised as you said, that there is NO reason to cut the power to the speakers. If there were a reason to do so, I’m positive that Dr. West would have installed automatic shut-offs as my Martin Logan’s have.
Having owned M1’s, M1PX’s and now Majestic 845’s, I’m on my 3rd. pair due to upgrades and I have left them all powered-on 24/7. My only reason in contemplating otherwise, was due to my “Audioneurosis” — aka