The wall won’t stop drugs being brought in, because they bring them in through legal entry means at ports of entry, not by carrying in small amounts by backpack.
Or just build Catapults. Or tunnel under it, or any of the means they already use to defeat the Fence. The idea that we need a solid physical barrier there overlooks the Fact that there's already a solid physical barrier there, and it didn't work.
Re: "Small amounts." A kilo of Cocaine goes a long way. That's a small amount, because once it gets here, it's cut, and broken up to even smaller amounts. Rocked up with baking soda, and a catalytic mesh like brass scrubbers.
It's profitable, because Anyone can do it. The drug cartels don't need to spend money on mules who they might not ever see again, when they can just sell it by the
Key to San Diego tourists, just like they have since the 80s. Even if we stop the Mules, that just means San Diego Tourists can keep buying keys, and flipping them to pay for their next vacation to Baja. They don't get checked at the border, because all the focus is on Mexicans, and the Cartels know this too.
You know what you can't buy in Colorado? Mex. There's no market for it there, because they have much better weed, and you can buy it from the store, in the same storefront where it's grown in the back. It doesn't make it any farther north than Española NM, because in Taos, we have white people drive up to Trinidad to buy the good stuff from there. (It's also Legal in New Mexico, but even before it was, only the poor smoked Mexican dirt weed.)
This still doesn't say anything about the Meth epidemic in Albuquerque, and Phoenix, which is so bad, they made a Series about it. They don't smuggle shards up from Nogales, because they don't have to. The Wall doesn't address the Heroin epidemic that was caused by Oxycontin being marketed as "Non-habit forming." With free samples passed out by doctors, before turning away geriatrics for "Drug Seeking." You have this picture in your head of criminals, filling our streets with drugs, and that picture is Mexican.
The truth is, that the Junkies are a lot of them grandparents, living in West Virginia, and they don't get their fix from Mexicans. They get them ultimately from Afghanistan. That's why the CIA has been not fighting a not war there since the 70s. Funding, they lost the Opium Road in Vietnam, Laos, and Cambodia in the 60s.
This is why stopping the Government to build a wall won't stop the flow of Drugs: The DEA needs money from the Government, taxpayer's dollars. So does the Border Patrol, and the Coast Guard, but the drug companies, and the CIA don't.