First - oops - sorry so long!
I get why people want to have their own. In fact, being childless, I think the whole pregnancy experience is... fascinating, alluring even. It pains me that I'll never know THAT experience. Trouble is, almost nothing else about having kids is as appealing to me and a woman like that shouldn't have children. Nine months is barely a blink of an eye in a child's life and a woman should want a child for the child's sake, not for the experience of birthing.
Isn't it interesting what each of us may look back at with curiosity or even longing? I too find pregnancy as amazing, and since I was in high school (and probably before that) longed to feel a child moving in me... It just seems so intimate and the bonding so complete. Now, the pain of childbirth scares me, but I believe all the moms out there that say it is nothing in comparison to being introduced to your child and the love that follows. I still have pangs of longing for the experience... but as you say, what matters is the child and the parenting, the rest is selfish. But, I do wish I'd had the experience.
I also missed all the baby sweet stuff and the cuddling and all those firsts that make you so excited. I missed all the little girl moments... The good news is that we skipped lugging all the baby gadgets and paraphernalia with us, skipped diapers (for the most part - we then taught 2 year old Sunday school for 4 years... so you get NASTY diapers there!) and some of the sleepless nights. You see, out daughter was placed with us when she was 8 years old. There were plenty of sleepless nights as she cried for her birth-mom or her siblings or because things were just so different (even though "I was her favorite.") We started off with board games and dance class. LOL And trying to give her all the toys she had missed out on. We also started with dyslexia and learning problems...
Anyhow there is beauty in how we became parents but I still didn't get to fulfill all those maternal longings I had. I still get teary eyed when I see babies (not so much anymore, but it still happens). I think it is maybe because I'm approaching 40 and I know that the biological clock is shutting down (shoot, realistically it was never there given my problems, but these things aren't always logical.) Yeah, sometimes I feel cheated. But many times I feel blessed. Blessed that we can radically change a young girl's life and give her a future. Blessed that a child would look at me and be excited that I was going to be her forever mommy (granted now at 14, in angry moments, she swears she never said that LOL.)
There are lots of difficult moments, beyond normal parenting (and it is hard to distinguish what is an adoption issue and what isn't sometimes). We are going to face all sorts of bad choices she's going to make because she didn't have consistent parenting when she was little (and reap the consequences of our parenting too).
I guess I'm just saying that we all get to make choices for ourselves. Some choices are made for us (in the case of my infertility) but I still got to pursue adoption. Even when we make the choices we make, I think it is normal to think "what if," even if it is a fleeting thought. When it becomes more than a fleeting thought, you probably need to take a step back, and really analyze why... and decide if it is a life changing thought. As a child-free person, you do have some choice (when you are a parent you can't go back! LOL).
I do think that there are some great pluses to not having kids, there are some equally great pluses to having them, and depending on your individual bent, you end up with your choice!
I don't think any of us can tell you what is right for you. We know what is right for us. And we may desperately want other women to feel the same kind of joy that fills us as parents and feel bad for women who miss out on it, but ultimately it isn't a way to look down on you, but instead a reflection of how much that mother loves being a parent and wants others to share that same kind of joy. Does that make sense?
I don't look at child-free couples any differently than I do couples with children. Of course, I think the natural inclination is to assume a married couple will have children because of the perspective you grow up with as a child (there are always kids in families!) I remember being confused when two people were married and there were no kids (ok, so I didn't understand about the husband-wife relationship
) I also think growing up has changed my perspective about all relationships. Take any comments people give you with a grain of salt. Hopefully it is just a reflection of where they are at, and not truly looking down at you. I think for many, they just can't imagine that alternative and so it is a shock. Kind of like running into my family of 2 white parents with a Hispanic child... We get a lot of stares and even hostile people who tell us we are doing something very wrong. A lot of it is curiosity or trying to figure us out, or in the case of the hostility, not knowing us or what we do. I remember telling my daughter that people might not like us being a family and her response (at 9) was "Why not? We LOVE each other!"