I agree your way would be best, but I just don’t think anyone in the government has the stomach or desire for it.
Issuing some kind of DACA card similar to a green card, to the current people only. Newcomers wouldn’t have the card, so they would be run of the mill illegal aliens subject to immediate deportation.
Our conversation would be an excellent springboard for an article addressing the corruptible aspects of illegal immigration, and societal decay.