Presumably a sufficiently advanced AGI could tweak it's own circuits in such a way as to create RF waves and interact with WiFi or some other radio based networ

Presumably a sufficiently advanced AGI could tweak it's own circuits in such a way as to create RF waves and interact with WiFi or some other radio based networking and insinuate its way onto a network even if you tried to airgap it by not giving it a physical ethernet cable. Basically, you have no idea what something orders of magnitude more intelligent than you is capable of; that's the concern. Personally, I wonder what would motivate an artificial super-intelligence in the first place.