Article is titled: "Success at Work, Failure at Home" and they say they can relate to this. Laments that "...comes at a cost: I might not ever be able to have a normal relationship."
I'm not saying working on their project doesn't bring them some happiness, but they hardly sound like they're as happy as they could be.
I agree with your prior statement (happiness should be your goal, and you probably haven't invented 'sliced bread'). You can't 'have it all' if your work makes you more happy than (or is more important to you than) your relationships/home, you should probably focus on that and divorce/leave/whatever so everyone can move on with their lives.
I read the article as a lament. Although maybe I misread and we're both pricks. :D
I'm not saying working on their project doesn't bring them some happiness, but they hardly sound like they're as happy as they could be.
And I'm probably just a prick.