If someone burns down your house, can they say it cost you nothing, because they paid for the matches and gasoline? Of course not. The cost is in the destruction of the house, and also the stuff inside the house.
trump's terrorist attack destroyed a third of the White House. There was not enough warning to get stuff out, so the American taxpayer also lose the stuff inside the East Wing that belonged to them. trump is blocking any accurate estimate, but that all appears to be about a billion dollars.
But if that terrorist who burned down your house offered to build you a new house, to his liking, that would make up for it right?
The lack of warning allowing stuff inside the house to be destroyed would be a problem. But even beyond that, someone else does not have the right to steal from you, and then decide what you get to own afterwards.
I keep coming back to the question, why did it have to happen so fast? Why not remove everything from the building first? Why not run the demolition past the relevant oversight? Why not do a controlled archaeological dig on the demolition? Why not take samples of the fixture?
trump does not even have a realistic design for his replacement plan. The current design has stairways going nowhere, and misaligned windows. It is something thrown together quickly to excuse the terrorist attack.