I don't understand this, either. I have a set of Hirsch chisels I bought on the advice of a very experienced friend. My favorite set is my Bergs, but the Hirsch take a very good edge and hold it a long time. Yes, the back is polished too much, but that can be fixed. I also replaced the handles. That's okay; I've replaced handles on Stiletto paring, Stanley #60 and Narex mortise chisels, too.
I'd say that for the money they're hard to beat.