I think we've touched on this before, but many sports martial arts DO have extensive weapons defense training. It is a huge part of the SAMBO curriculum, and not exactly a small part of BJJ either. I would say the majority of MMA gyms that I am aware of train weapons defense in some form, whether based on BJJ, Bas Rutten's rather popular system, or other weapons defenses available through law enforcement or the like. The equation of TMA= has weapons defenses and MMA/sport = no weapons defense is just plain wrong. I am aware of TMA schools that do not run weapons defenses, and most MMA schools DO have weapons defenses.
I'll play devils advocate here for a moment. In past posts, you and I have had discussions regarding proof, either by a written record, tape, etc. I havent seen any BJJ weapon defenses on tape. Why is it they're putting every possible mount, side mount, guard pass, north/south, position, on tape, but no weapon defense?? If its superior, don't you think they'd market a tape?
Mike