A bester 1200 should put a nice edge on a Victorinox with no trouble at all. Strop on some newspaper with black print on it after the stone, cheap enough
It all depends on the hardness of the wood, I suppose. And the toughness of the knife edge.
Cracking is probably due to moisture content
+1 on the video. It would be a great resource to have someone explain how to rehandle a Japanese knife on video.
They are certainly the most common cutting/chopping board in China for home use. I saw them in every convenience type store and airport gift shop I was
Sharper knives also cut skin with less force and slippage...also not a huge jump in logic. The [weak] reasoning is not enough to validate the claim.