EDIT: I went back and read it, I agree with most of what he says (and my original comment wasn't very relevant to this particular article), I would just add "don't stress about productivity, most of the time it's fine to just do what you like".
On a more serious note, I feel like "maximizing" "productivity" on things you are passionate about is largely wasted effort (unless the thing you are passionate about is "maximizing" "productivity")...
No, it hurts my happiness to read productivity articles, so I skip them.
The fact that so many see it as something else is interesting on multiple levels.
As well, there is a reason that Buddhism's viewpoints on dukkha and nirvana needed to be invented/discovered and taught (and that people struggle to learn them.) The idea that there is a happiness that exists as a state of *being8, that does not involve "doing", is not, seemingly, an instinctual belief among human beings—or even one that's very easy to convince people of.
i could tell you didn't read it, because if you did you'd realized you are more similar than you think.