Aralangs aren't the only ones with AM technology.
If we allow them to be tough enough, it goes to the point that it's not humanely possible to beat them in Chess. AM fields recognize what's magic, and what isn't. Computers would see our bloody moves in Chess, and recognize them and know how to deal with them. Besides, computers don't really think.
Actually, we have to technology to wipe out the ENTIRE world population from ONE genetically engineered disease. Deadlier than small pox, while more contagious than the common cold.
I used bad analogy, but hell, the key thing seems to be a bad analogy. More like... a lock that has acid that devours the lock on physical contact. You need a special key to make it survive. Each type of key represents magic, techology, Spirit Energy, and other ways. Magic is the key that devours the most. It would instantly devour. It would be as good as ash, or sand, or dust.
Nisorin, I believe nobody has EVER found a way. I believe nobody CAN ever find a way.
Hiro, it's an anomaly. AAM is anomalous. You've already got something that counters magic that's anomalous.