Oil drilling is pretty unsafe, as is mining underground. Mining volcanoes will probably fund a lot of research into understanding volcanoes so that mining companies can predict them better, which might make other communities that live near volcanoes more safe.

But in general it will likely be unsafe for the miners and their surroundings, like any other mining method. Initially probably much less safe than traditional copper mining.

Does safety factor in to it? As long as the profit is enough to outweigh any death or liability payouts then the company doing it is golden.