Air gapped machines without untrusted individuals having physical access DO NOT have ways to "enter programs into them".
Just have to be very careful about who is granted physical access. You let any idiot with a USB drive near them, well, you're a moron. Also disabling USB is a nice idea too, in some contexts.
But this whole "IT'S INEVITABLE, ANYTHING CAN BE HACKED, GIVE UP TRYING FOR SECURITY!" theme is horseshit.
Air gapped machines without untrusted individuals having physical access DO NOT have ways to "enter programs into them".
Just have to be very careful about who is granted physical access. You let any idiot with a USB drive near them, well, you're a moron. Also disabling USB is a nice idea too, in some contexts.
But this whole "IT'S INEVITABLE, ANYTHING CAN BE HACKED, GIVE UP TRYING FOR SECURITY!" theme is horseshit.