It isn't all glitz and glamour, and people should know that. However, my issue with the article is not the 'it's not all glitz and glamour' but the 'it's shitty, you never see your family, you're constantly stressed, and your chances suck'. That is discouraging, and totally unnecessary.
If you're going to do high risk/high gain, it's warranted and good advice. But to imply that this is what entrepreneurship is like is unfortunate.