"We" aren't stupid. If you take the slowcoaches among us to the White House and ask them what's that thing around the perimeter they will quickly identify what it is. When you ask them why it's there is when the light bulb comes on. Of course you are going to get a few "Yabuts". We just need to euthanize those people. They will be your useful idiots who vote Democrat so it's all good.
The last time I was in DC, i saw the Whitehouse. It has big beautiful iron fences surrounding it. It works, everyone there was outside looking in. Recently there were a couple of men who jumped the fence, they were criminals. Easily identified as criminals because they jumped the fence. They werent there claiming asylum or looking for a better job.
So easy a caveman/woman/transgender/bi/q/t could figure out.
Bob in Honduras, doesn't just decide one day to leave and travel 1,500 +/- miles to cross a border. A wall won't keep out the paid minions headed this way. Problem won't stop until whoever is paying Bob is stopped.
Article says the wall shown was a 'prototype', so they had unlimited time and resources to cut through it. As said above, with enough time and the right tools, any wall could be breached.
Steel square posts filled with concrete, which is what that 'prototype' looked like, would present a pretty substantial challenge for anyone to cut through without some type of vehicle-mounted equipment like torches. You don't carry that kind of stuff on your back.