Perhaps things were buried there to defile the land.
I actually kind of wonder if there wasn’t some sort of deep state surveillance stuff in there - that is, the deep state spying on the White House, spying on Trump. Could have been used to help control THEIR people (Obama/Biden, and maybe Clinton/Bush going all the way back to the installed Johnson), to keep tabs on their activity and then threaten when they veered off course.
Of course, they can’t control Trump easily, if at all. But they may have still been able to see “maybe” what his next moves would be if they had some inside information. Barring having a person inside his inner circle, they may have had to rely on spyware planted in parts of the White House. Perhaps all of Trump’s remodeling activity is, in part, to root out spying mechanisms that the deep state has been using.
In the meantime, he keeps them occupied with pooping planes and such, raising their ire over meaningless barbs thrown their way.