If you look at his channel, it seems as very successful one where basically every his video gets lots of views, which comes to my mind that some people simply listened without having interest in the first place. He just point out how "bad" mining is, and problems with stability - their are simply facts and they are true. Things will change as we get more exposure. He obviously is trying to sell the course at end and all of this is just introduction into buying - spent 10mins of my day for nothing