I can see it from both sides of the coin. I never wanted kids. Kids never wanted me - whenever the new babaies were brought into the office, said small humans would take one look at me and burst into tears... I was not exactly maternal.
Then MrW & I got together and this co-incided with me being told I would probably never have kids for medical reasons. I was quite accepting of the fact, as I never viewed my feminity or sense of self as being womb-related.
Then I became pregnant.
Gave birth to WMnr and *wham* instant mother-child bonding. Now he's 20 and at university. I am so glad I had him. Having a child puts an entirely different perspective on life. Ok, so it limited the career (a lot), and limited the nights out clubbing, and pauperised MrW & I, but the benefits have far outweighed the downsides with the joy WMnr has brought to us and MrW has been a fantastic dad.
Saying that, I entirely respect the choice of those not to have offspring. That's their choice & their lives. Then there are those who would love to have them and can't. That can be a tough one to come to terms with. The ones I do not like are those who have kids and then don't take their parenting responsibilities seriously.
Mind you, we need lots of babies as they are required to grow up, work and pay the taxes that provide pensions to those of us currently of working age...