I am honestly surprised that someone as smart as Elon wouldn't recognise both the crassness of a comment like that, and that he likely doesn't fully understand the political landscape that caused the situation.
Good luck getting through the red tape and border crossing negotiations. To say nothing of the near 50 degree weather beating down on old infrastructre that spans thousands of very sparse kilometers.
Edit: to clarify, it is arogant because he is stirring an already controversial pot in a country that is frankly none of his business. I am from the state that is enduring the power troubles, and the technology in use is not the core of the issue, it is the artificial market policies dictating the generation of power. Having batteries wouldn't solve that, as having people to pay for the energy generation is the mechanism that is actually broken.