This is hardly the ultimate wall.
Unlike a real wall this be wiped off the books with just a stroke of the pen
Well then have Congress pass legislation to enshrine the EO into law, and require more than a stoke of the pen to reverse it.
A wall isn’t effective if a future Democrat President axes the ICE budget and doesn’t repair the wall.
You could always moan and complain that something isn’t full-proof. But that’s no reason to oppose this EO.