I think you missed author’s idea. He is telling that a law-abiding worthy immigrant or simply tourist has little to none chance to enter US legally. It is not the case for millions of savages willing to cheat the system.
Why would they even want to come here legally? They could do better by coming in illegally and waiting in comfort on under the table tax free wages and government benefits until Rubio, McCain and the Democrat party gives them citizenship and voting rights.