Yeah... i totally get where you are coming from. I see both sides of it. On one hand, customers want to know as much as they can to make informed decisions. On the other hand, sellers want to protect themselves from people trying to copy them or market based on saying certain aspects are the same. Its a tough call most of the time. In this particular case, the choice not to share is Heiji's, so I can just respect his wishes. However, there are many things that i personally choose not to disclose... for example, there are some knives i sell where i choose not to disclose the steel publicly. In most cases, my decision on this is a function of a few different issues...
First, most of the time, knowing the steel type does very little to inform customers about how a knife will act. They are in a much better position as far as understanding goes if they know whether a steel is stainless, carbon, or semi-stainless, whether it is finely grained or a bit more coarse grained, what kind of relative edge retention they can expect, what they can expect in terms of relative ease of sharpening and edge taking, and so forth. So, i try to provide that kind of information. Second, not putting so much out there encourages people to contact us and ask questions, and i prefer to have as much customer interaction as possible. There are many cases where i dont list the steel type, but am happy to share it with people that ask.
Anyways, the main point here is that i see your point and i dont necessarily disagree. I would just hope that people can be more understanding of when craftsmen chose to share or not share information. If you're not particularly happy with the way one goes about this, there are plenty of other craftsmen out there to choose from. But, continuing on and on about how someone is bad for not sharing something they have the right to share or not share gets us nowhere.