Quote aside, I haven't found the heavy industry statement you seem to be talking about. Is it about that Bezos tweet or whatever? There's some great promising manufacturing techniques in zero-g, but it seems incredibly obvious sending anything in space or low orbit now and in the near future requires expending more energy than whatever its refinement or manufacturing will be worth. Furthermore, no, you can't fix Earth now. The only possible way to achieve that is eradicating humanity. Don't start talking about war, famines or whatever without imagining the disastrous consequences they may have (overpopulation, et cetera). The best humanity can do is continue experimenting and developing new technologies to at least improve the lives of the majority of people.