It’s a physics demo, not a graphics demo.

It doesn’t really matter if this is consistent with any level of Star Wars canon; it’s a demo meant to show off the capabilities of Unreal Engine 4, not a fan film trying to perfectly adhere to the Star Wars universe.

This reminds me of a comment I saw earlier on an old Kotaku article about Half-Life 2.

Someone was asking about controller support in the PC version, and just got railed by a bunch of /r/pcmasterrace assholes about the “superiority” of the mouse and keyboard, and then advised to “provide a reason” when asking about…