Hi,
One issue with this, what about the sword in the stone? Or the other medieval stories of weapons tied to single individual? So there are times it does make sense.
Probably just for the vanilla lore, it wouldn't make sense for a new/vanilla player to be able to biocode a low tech weapon since magic doesn't exist in the vanilla lore.
Looking through the XMLs, it seems to just be a tag you can add to weapons, so it will be very easy for a modder to make a biocode enabled sword.