Then why are we going there?They could always simulate the floo powder or a port key. After all, it is the Wizarding World.
I'm only trying to let out my inner J. K. Rowling. This seems like something she wouldn't let happen especially if it's true that she's the one with the idea of removing Dragon Challenge in the first place. I wouldn't be surprised if Diagon's placement was a little of her as well.