You are right, it was an oversimplification, 25% is hardly a 'rare exception'.
In my defense I have to say that it was late, I was already in bed, and very sleepy. And I knew that, this being lemmy, some other nerd would come with a more thorough explanation.
I'm not saying I agree with the other commenter, specially in the tone, but... where do you think the copper inside your walls comes from? Is this a NIMBY or are you proposing we abandon electricity altogether?
Mining is super messy, all of it. For the environment, the people living in surrounding areas, the workers... I think it was just yesterday I read an article about copper mining in Chile: polluted waterways, lots of orphans when a mine collapsed, people sick, others displaced from their homes... you know real actual problems, not some superstition.
Couldn't we get the copper without fucking so many people so bad? Certainly, but that would affect profits so it's not happening.