In defense of the choice, the actor/writer/director does certainly have an eccentric sense of style, and a wonderfully weird sense of humor.
Would anyone really be entirely shocked if he was just a rock creature like Korg hiding out on Earth in a human costume?
As has been noted a lot in the run-up to the release of Men In Black International, this is the second time that Chris Hemsworth and Tessa Thompson have collaborated after the hit 2017 blockbuster Thor: Ragnarok – and the first name mentioned in that conversation was the ringleader of that particular circus: Taika Waititi.