Two things:
1.) You're conflating. There is no defense here, it's a discussion, where skepticism is natural. I'm simply stating the facts. Apple never confirmed that it is 316 L stainless versus surgical grade, there is a difference contrary to what you believe and the proprieties. So you don't have any evidence stating that it is 316 L or the same, when in fact, they are not in various applications.
2.) Could you please link me to the thread where other forum members have stated that it's PVD used on the Apple Watch black Stainless versus DLC now? Not that I don't distrust what you're saying, but they're also a lot of anecdotal opinions without evidence unless confirmed by Apple.
( Also, that same argument was brought up last year that the Series 2 Apple Watch space black was using PVD, when that was debunked to by Apple directly stating that it indeed uses DLC. So My interest is piqued to read Otherwise and how someone definitively can confirm this, at least based on what you read.)