At face value this does seem incredibly stupid. There certainly is more to it than just face value.
The more I think about it, this is a move that shows superiority and dominance of our military over Russia. Showing vlad in a language he can understand, that it's over , go home, lick your wounds count your losses and call it a day.
Even if Russia tries to nuke Kiev while great grandpa Joe is there, we probably have some missile defense technology that will turn their missile into puppy's and rainbow balloons or something like that.