Davey, I think you misunderstand some things. First, I don't think even El Presidente is actually thinking of a wall along every single mile of the border. Secondly, we get it...most drugs and other contraband are not carried through the desert by illegal aliens seeking to relocate to America, because we're talking about bulk...it really does come through at the check points. Thirdly, if we didn't have so many border agents out patrolling the desert, perhaps a few more would be available for doing thorough inspections at the established border crossings.
I've seen a fair number of actual ICE/CBP people talking about wanting a wall (including Obama's former head of CBP). That article was written by someone not liking Trump, and interpreting things confiscated at the border crossings as evidence the wall is not needed. The wall is better suited for guiding "asylum seekers" to the official border crossings than it ever will be in stopping the flow of drugs. In that sense I say, build the wall.
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Oh yeah, and do like they do in South Korea for walls intended to keep people out. Rim the top with either concertina wire or glass bottles embedded in concrete and then broken off.