Maybe technically isn't the proper term--perhaps "legally" or something similar would be better?
Either way, the reality is : who expects a practically new bow to crack? You don't buy a practically new truck and expect the engine to blow. On the other hand, if the bow (or the truck) is several years old, you know up front that a problem is a possibility. That was my point.
The guy that sold him the bow may have known about the problem, might have even caused it, but is he responsible? Legally, I'd say not--couldn't prove it if he did know anything, and I'm assuming he didn't offer a warranty. Morally, I'd say yes.
This is where, IMO, the bowyer should step up. Send him the bow, and if after inspection he determines (honestly of course) that the failure is likely due to moisture content, a dry glue joint, or anything else that could be considered a material or workmanship failure then the bow should be fixed or replaced free of charge. If it's obvious the bow was abused, then the bowyer should be able to determine that and let the fellow know the details, so he can try to hash it out with the seller.
No horse in this race for me either, I just hate to see someone get a raw deal--it's a blight on all of us that are in this business. I do have a bit of experience to base my opinions on--15 or so years with a retail archery business,which includes selling hundreds of bows and dealing with some warranty work--half or more of it taken care of even though it was outside the warranty. I even got one bow fixed for $50 when the bowyer wanted $250 for the same repair--and it was obviously the bowyer's mistake! I did buy the bow second-hand though, so no warranty.
Like I said, I think I can name as many or more con bowyers I've learned of over the years than I can think of customers (thousands upon thousands) that have tried to con me. Almost all of them have been exposed and/or are out of business.