I would have to say that is a false statement. Here is a statement made from a dealer in stamps " This tool should not be struck with a weighted maul as this stamp is made of a lightweight metal, likely zinc, and could bend or break."
This is from another tool manufacturer. "Using only stainless steel in the making of these tools, you will see the precision grinding in every impression you make." Key word grind. That tells me handmade. Like Craftool did years ago.
There are several manufacturing plant pumping out low quality tools. I for one don't want to keep buying them over and over. Am I saying never buy overseas? of course not. Japan has some great tool makers. What I am saying is, if it sounds to good to be true, then it probably is.