Until the paragraph you had just written, you hadn't put forward any argument addressing anything I had said. First you dismissed me as judgmental. Then you dismissed me as having a myopic view of the world. Those are ad hominem arguments.
Regarding what you just wrote, here's me acknowledging that there is meaning to be found outside of children (which, logically, implies that childless people can find meaning):
> I can think of many people in my life who could probably find a lot of meaning without children.
My argument is about playing the odds. Children are the most meaningful thing in most people's lives. Most people do not find many of the other things they spend time on meaningful (their career and, proxied through their spending, consumption of goods and services). As a result, I think it's a pretty good default strategy to have children. Which is why I promote that strategy whenever somebody is on the fence (OP sounded like they were on the fence, after all).
But if you've thought seriously about it and decide that there's something else you'd rather do with your life, then by all means, follow your heart.