Yes, Hermes discloses in GREAT detail. But they've got their own issues too, and all machine made (except B, K, & a few parts of the C). I've noticed some of their leathers are thinner lately tho. You also said Chanel's lambskin is delicate. And, ummm, clearly it's not. Unless it's on a classic then it falls apart. I have some great pics of a pink lambskin jumbo I got last year that arrived discolored just from being in a box (BN from boutique). It was horrid. And Chanel did NOT stand behind that one (later the whole line was recalled).
I am not here to convince you. I really don't care if you buy or not. I have bought more Chanel than probably anyone on this forum. My posts here are for people who welcome information about making expensive purchases. They are not for people like you who don't want to hear, don't want to investigate, and don't want to see. So if it's not helpful for you, just move on. No need to belabor a point that you can't substantiate.
What you DO say, that's key, is that you "don't know". And you say that quite a few times. And this, THIS, is exactly the point. NO one knows anything 100% because Chanel chooses that. They choose to withhold information, withhold production and materials specificity, withhold transparency in the manufacturing chain, along with all the other things they keep from their customers (product information, colors, dimensions, release dates, rules, shipping restrictions, availability, exceptions, etc). They do it in all other areas too, RTW, even the diamonds that come in their fine jewelry (color? clarity? no disclosures). It's not circumscribed to "leather" products, it's the company approach in general. If that works for you, then great!