People who shouldn't have kids

So Salon has this article about this guy who might want kids (65% sure he does), but his fiancée doesn't want kids (70% sure she doesn't), and then he's considering how or whether to convince her to have kids.

I'll admit, I was planning a much more vicious rant (including a lovely metaphor about whether you'd want someone with a mark of 65% in the classroom component of driving school and 30% in the in-car component to be driving around on the road), but dude ended up acquitting himself somewhat near the end. Essentially, his dilemma came down to this:

[...]when I toss it back at her wanting to know what she'll do if I decide I must pursue a daddy destiny, she sighs and admits, "Oh, you'll probably convince me to do it."

But I don't want to if she's not totally on board.

I'd probably love having kids. The question is: can I live without them?

Now here's the thing, Mr. Smith, if that is in fact your real name. If you decide you cannot live without having kids, that means you should not have kids. How do I arrive at such a bizarro conclusion? Walk with me, I will explain.

1. Kids completely and permanently change your life. We know that. It's a given.
2. If you decide you cannot live without having kids, that means you have decided you cannot live without having your life completely and permanently changed. In other words, you do not find it acceptable to go on live with your life forever staying the way it is now.
3. If you do not find it acceptable to live with your life forever staying the way it is now, that means that your life is not satisfactory.
4. If your life is not satisfactory, that means one or more of your inner life, your social networks, your relationship with your fiancée, or your contributions to society are unacceptable (unless I've missed some major component of life satisfaction).
5. If one or more of these components of your life is so unacceptable as to make your entire life so unsatisfactory that you need to completely and permanently change it, that means that you do not know how to make that component or those components of your life acceptable with the resources available to you.
6. If you do not know how to make one or more major components of your life acceptable with the resources available to you, how on earth do you expect to raise a child who can make a life that is acceptable to him or her? If you have not yet managed to build a life that you find satisfactory as is, why on earth do you think you are qualified to teach another human being how to build a life?

Once you have succeeded in building a life for yourself where you can look around, lean back, fold your arms, and say "You know, this is nice. I don't mind this at all. If I didn't end up having kids, I'd still have a perfectly happy life, because everything here is quite acceptable," then you can start thinking about having kids, if all other circumstances are appropriate. But if you think your life is incomplete without kids, you aren't ready. Don't go around making yourself responsible for other lives until you have figured out how to build your own life.