I say the wall has already been built.
These are some figures of visa denials from US consulates around the world.
2018 numbers are out, and basically, everyone is getting denied.
This is what happens to people who do it the "right" way.
212a4: public charge (you might take a public benefit: 415%)
212a6Ci: misrepresentation (you lied: 137%)
212a6E: alien smuggling (you snuck someone in: 213%)
221g: visa refusal (generally: 134%)
A likely story.