A fence is linear construction. It simply cannot be built upon rocky cliffs and river banks. Better money and resources could be spent on manned posts and drones rather than a fence.
The border that is true land...yes a fence should be built.
Nothing strawman. A cliff is a lot easier engineering obstacle than a moon shot.
It is PATHETIC to sit and argue we cant build over/through/under and around mountains/rivers/swamps etc when we do it on private land and yes public land daily.
Don’t insult our intelligence.