I agree with some of the things he is saying and for me the quote below is the most important point in the article.
"A passion people won't pay you for is hardly the basis for a career -- it's a hobby. You can still love your hobbies. Just love them in your spare time."
What I see is that people have taken the "follow your passion" movement and disconnected it from market demand. And a lot of time that doesn't work. Yes there are always exceptions to the rules but at what cost do you want to find out if you are the exception?
I think people should find balance. If you happen to be passionate about something that is innovative or fills a need in the market go for it. If you don't, then still give time and energy to what you enjoy but not at the expense of a business or career that will allow you to live a comfortable life.
In terms of business or careers I don't think you should do what you hate but you may not get to do what you love and make a living from it.
Another approach is to pursue a career that provides for you right now, save and invest for retirement and then do what you love then.
As a cautious optimist the main thing that attracted me to this article is that it brings reality to "passion".