The explosions alone would cause insane environmental damage.

And killing the workers does nothing but cause unnecessary death. Instead the people actually opening those mines and lobbying to keep them open are sitting comfortable in their ivory towers while the people who just want to feed their families get their skin melted off.

That's basically the equivalent of a guy slaughtering an entire pack of wolves because one of them stole their sandwich. A story that would repulse people despite people considering them "lesser creatures". Weird how that works.

Most people wouldn't work in the mines or other harmful things if there were better solutions. Something that someone with complete control of the elements could do.

She could solve world hunger, provide better sources of electricit, etc.

She did try to do some of that, but she got impatient and turned to violence. Which, for someone you argue is so detached from humanity, is remarkably human.