Alex Gibney opens his documentary about the tech titan Elon Musk with a question: “How could Musk assume so much power, and why had we given it to him?” 亚历克斯·吉布尼关于科技巨头埃隆·马斯克的纪录片以这样一个问题开场：“马斯克怎么能获得这么大的权力，而我们又为什么把这些权力交给了他？” The Oscar-winning filmmaker, whose…