As a privately-funded attraction, AKA "silly thing to do in Vegas" this seems fine, no worse than visiting the Ice Bar or climbing a reproduction of the Eiffel Tower. Hopefully none of those Teslas catch fire in the little tunnels.
I think people miss this point, Vegas is a spectacle. If they are going to do something it has to be an attraction not just a rote tool that serves a purpose. They literally want it to be a place you have to go to because you can't experience it anywhere else.