the problem isn't the barriers, the problem is the barriers are not covering the entire border. I'm sure it's much less then 1/2 our mileage with MexicoRight, they're so effective that the people who try to circumvent them are stopped and caught.
So you just proved there's no need to do anything different.
Do you realize you've undercut your own argument?
The more the border is "walled off" the less ability to penetrate across it