You may want to transit the airspace of the US or one of their allies in the future.
Of course, if you’re flying over a landlocked country, and every neighbour blocks you from their airspace, you don’t have many options. (Not that this quite happened, but looked to be going in that trajectory).
Suddenly withdrawing permission for a plane to fly through your sky, after it has already taken off and does not have enough fuel to take an alternative route, has the same effect as ordering it out of the sky.