A wall without men to guard it is nothing at all.
We have plenty of military forces. They are deployed in all the wrong places for lots of wrong reasons. Some adjustments are necessary.
I was thinking of men w/o the wall. Some have suggested that because they think the wall is “racist”. That’s dumb. That would require a lot of personnel. The wall makes the difference. Fewer personnel can guard more territory with the wall. Emperor Qin figured that out over 2200 years ago. I think we can do as well today. So I agree we will need personnel to man the wall, but probably less than we’d need without it (if it would be possible at all).