My point is that effective defense against typical criminal edged weapons isn't some Holy Grail of martial arts knowledge. mercop, SouthNarc, and Michael Janich (just to name a few) are regularly teaching Regular Joes (not to mention law enforcement and military personnel) without any previous or limited martial arts training simple, effective unarmed techniques against edged weapons that take all of a 4 to 8 hour block to get down to a reasonable level against aggressive, full power attacks.
Heck, mercop even backs it up with a "Block this or get tazed in the nutz!" performance enhancement. Ask unloved!