Or since they are hive minds replace DNA with Psionics same result.
whmmm... we could say they are dna locked and we are unlocking it with research even now.
True but knowing that there is a lock and trying to circumvent it using current technology are two different things. And if any attempt to tamper with a weapon causes it irrepairble damage. It'd be like trying to pick a padlock that not only fuses itself into a solid lump but welds everydoor and window shut. You could still see the contents but only after tearing the whole building down.