We want a wall because illegal aliens are not coming through the conventional border points. So what good is it going to do to close the border?
Aside from the intimidation value such a slap in the face of Mexico’s pres has it frees some border-and-customs agents who would normally be stopping traffic at the border stations, asking for visas, green cards, etc, having dogs sniff for drugs, check luggage for contraband and stuff like that-they could be deployed on the border in the areas where there are lots of illegal crossings to apprehend mojados instead-every little bit helps...
And Obrador will not look good to the people who put him ion office if he loses face-Latin culture does not respect weak leaders.
It will force Mexico to stop allowing and assisting caravans,, for one thing.