The point of having kids is likely different for everyone. Some are certainly big on the while passing your genes thing. I was personally always happy to adopt and liked the idea of maybe adoption and my own kids or just adoption as we were facing some issues with having children for a little while there. My wife wasn't keen on it though. Her mother was adopted and I think that all the issues she seems to go though or have gone through affected my wife a bit.
I personally looked forward to raising kids. I enjoyed teaching my nephews various tricks when they were younger babies and am known for getting them to roll... I was very much looking forward to that with my daughter but she suddenly figured it out by herself much earlier than expected
*lol*. I love the play and she giggles like a mad hatter and I'm looking forward to other games as she gets older.
Still, I'm one of those people who enjoys sitting down and watching ants at work and such so I love seeing all the little bits of progress Evelyn makes as I find it very fascinating and have certainly come to love the personality she's developed. I've watched as she's learned to roll one way then the other, shuffle forward before learning to crawl up on her arms, pick up objects and test them first with taste, then interest in texture followed by the investigation of shaking it, hitting it against the floor and finally holding two objects and banging them together. She once used to simply take objects and drop them when bored but suddenly started to return them to their origin (in this case, my shirt pocket pens), then there was not only taking objects apart but trying to put them back together. When blocked from an object she once used to happily just keep trying to get to it until bored but now she's gained the understanding that she's been purposely restricted and will whine about it instead. There's the talking with simple words and then the first association of a word with something rather than just repeating whats heard (in this case the word "clap" will cause her to clap). Eating solids and trying different foods, working out what she likes and doesn't like and seeing the reactions.
Maybe it has something to do with my childhood as well. While I have experiences that are best forgotten, I had and have a very good relationship with my parents and have fond memories of them bringing me up. I also have memories of my parents really enjoying raising me, particularly my father who will come to an outing like my wife's 30th and spend the majority of it away from the adults and playing with his 4 year old grandson (my nephew) in the designated kids area. Knowing how much my parents enjoyed raising us is very likely one of the big things contributing to my desire to raise children, in the hope of experiencing the same joys.
I'm personally enjoying parenthood from the downs to the ups, but I can still sit here with the understanding that its not for everyone and that I don't need to push others to do it because I think they're missing out or anything silly. For a variety of reasons people choose to have kids and for a variety of reasons that could be their own childhood, future goals, desired lifestyle or simply a lack of interest, other people choose to not have children. And I neither see anything wrong with that or believe it to be a big deal.