I thought it was a good article, particularly the part about how the lack of a social safety net causes *individual* stress and unhappiness, even among the middle-class and wealthy folk.
I also see that the people who are the least happy being parents are those who are trying the hardest to ensure that their kids "have every advantage" (ie, are scheduled 24/7 from age 2 or so). I limit my kid's scheduled stuff to no more than two once-a-week programs at any given time. Sure, it means she can't do ballet, music class, soccer, art and swimming all at once, but it also means that most days, there's not a lot of having to be somewhere, which means there's not a lot of "Get your shoes on. GET. YOUR. SHOES. ON. NOOOOWWWWWWWWW" stress either. If we go somewhere, it's to the playground across the street, where I can yak with a really good friend, who happens to be the mom of my dd's bff, and it's somewhere we both want to go.
The other thing I see that makes for unhappy parents is a lack of supportive extended family nearby. My DH's parents live in town and we spend a lot of time with them. They are always happy to have DD come and hang out with them, so if I have errands to run, DD can usually have a choice of whether to tag along or not. I also have a reciprocal child care arrangement with a neighbour, so that both of us can, once or twice a week, take a class, teach a class, or just get some stuff done that's more pleasurable or easier to complete without little hands to help. So, we've got our village.
And, DH and I planned for parenthood from the minute we got married. Before, actually. We knew we always wanted one of us to be able to stay home with any children, so we never got used to two incomes. Even when we had two, we just stashed the extra and continued to live like students. We'd seen so many of our friends both working and hating it, wanting to have a stay-at-home parent, but unable to do so and afford the mortgage. So, we had the kid first, and the mortgage came when we could afford it AND still have me stay home.
Also, I babysat a LOT as a teen, nannied, and taught school-age kids during university; I had a pretty good grasp on the range of child behaviour, and more or less knew what I was in for in terms of daily work. (The breastfeeding issues were a bit of a shocker though.) When our daughter turned out to be on the easy end of the spectrum for just about everything, I had enough perspective to know it, and not stress that she is stubborn as hell, occasionally repeats naughty things I say in front of grandma, and is prone to hysterical fits if woken from a nap. A lot of my friends had no exposure to children before having them, which frankly ought to be illegal. (kidding. sort of.)
And we are CONTENT. Not happy 100% of the time - every family has conflicts, bad days, chores nobody wants to do - but we feel like we're doing it right, for the most part. Some of that is our choices, some of it's just good fortune. And I wish every parent - especially the unhappy ones - could have as good a life as we do, imperfect as it is.