Already been tried “smart walls” If its a place highly used to cross its a place that needs a wall. Sounds like agents could save time patrolling and use limited sensors or drones to counter tunneling efforts.
Obama already spent billions on the smart wall shit. Wasted.
Your being sold a bill of goods that eats up funding for cool gear that requires constant funding to maintain on multiple levels.
Walls work and require little upkeep relatively speeking.