Only millions of people that were simply born in the wrong place. Only a world superpower potentially turning into an autocratic regime in support of other tyrants.
But sure, other than the existential threat of the largest exporter of culture and most powerful military on earth in a country that has a history of imperialism and warmongering falling under the control of an autocratic regime of fascists, sure. Nothing of value.
Genuinely, I cannot tell what your point is. In some alternate universe, are we just rolling the rocks downhill? Don't you think we'd already be doing that? This seems like a great use case to replace diesel trucks with ones that recharge themselves using potential energy from ore. This absolutely is a galaxy brain moment, in that it's a very smart idea.