My take on the article was Musk drives you like a good highschool sports coach. Demanding, hard, unforgiving... and you either live up to the high expectations or you are weeded out.
Which actually sounds wonderful... working with an entire organization that is aligned in thought and motivations, and everyone bringing their 'A' game. Compare that to your current job...
Not to mention the guy in the article only worked with Musk for less than 1 year, over 20 years ago. I don't know about you, but I'm not the same person I was 20 year ago...