starting around 2004-2005, Israel starting relying more and more on technology to guard that border with Gaza...remote cameras, sensors and even remote machine guns. They pulled actual soldiers off that border as a result. Hamas had years to study their security set up...and sure enough, they got to the point that they used cheap drones to nullify the cellular “signals” and jammed the whole thing on October 7th....they easily breached the security fences all along the border and Israel had no idea it was even happening. The few bases there were caught off guard...some soldiers actually killed while they slept.
Nothing replaces patrolling, particularly with dogs!
One always needs the Mark 1 Eyeball for backup. Navy ships still have lookouts with binocs despite all the sensors and radars. At least they are supposed to.
The Israelis fell for the fancy gadgets syndrome. The gadgets have their place. But the techies promise way more than they can deliver.
McNamara thought that electronic gadgets and technical superiority would win the day in Vietnam. We saw how that turned out. Then Afghanistan. Again total technical superiority. How did that turn out?