Rifles can reach airplanes on the ground just fine, MANPADs have a habit of popping up in inconvenient third-world conflicts, and this whole idea that we need t

Rifles can reach airplanes on the ground just fine, MANPADs have a habit of popping up in inconvenient third-world conflicts, and this whole idea that we need to have secure ATC comms and need to rewire our navigation system is still an absurdity. Every modern airliner has dual-redundant or better GPS-aided inertial navigation systems, and every professional pilot is trained on procedures for flying in the airspace system after losing all their (multiple) radios. This is literally not a risk worth spending the millions/billions it would cost to mitigate, any more than Joe Average Internet User needs to hire a professional cybersecurity firm to secure his home Wi-Fi router.