Leathercraft Techniques

I've been struck by some of the Japanese and Korean artisans using very thin leathers such as Crispe, Togo and shrunken calf, I even bought some Alran French Chevre goatskin which I've seen used as well. What bothered me was (apart from the import duty) was that the goat skin doesn't edge well using a hot creaser, it's thicker than expected and spongy. I can't see this being used as a body, pockets and liner without resulting in a "normal"-thick wallet...nothing like the sleek wallets of these Japanese makers. It could simply be that the videos and photographs are "misleading" and giving the appearance of much thinner materials? The image below is of a Crispe leather wallet.