Neither my wife nor I have ever wanted children. It was amongst the reasons for us getting married. Previous partners have always been 'yes' or 'maybe' and as I was a most definite 'no', I realised there was potential trouble in store.
I do believe that children can bring great joy, and perhaps even purpose, to your life. I've even experienced something like it when I had a partner with a child. So I do not think people with children are foolish or deluded. On the contrary, I'm in admiration of their strength and focus. I could not be a father, I'm far too self-centred. I feel children are just not compatible with the life I want to lead. I'd end up resenting them.