I don't have kids because I have a great life with lots of meaning, and the benefit of adding my own kids for me personally doesn't outweigh the sacrifice that would come hand-in-hand (risk to my health during pregnancy, sleepless nights, constant worry, overstimulation, changes to my relationship with my husband, loss of freedom and independence, being less able to spend my money however I want including frequent travel to exotic locations, and much more).
I certainly don't hate kids - I enjoy the company of my very young niece and friends' kids of all ages. I also like then returning them to their parents and getting on with my own life.
Not having kids of my own has allowed me to be a real source of strength and support for children and young people in much broader ways. In my free time, I volunteer as a trustee for a charity related to child abuse. I've done career mentoring with disadvantaged teenagers. I have been able to support friends with kids at the drop of a hat when needed, including attending school meetings with a single parent friend whose daughter was going through a really difficult period, and taking other kids to school when their parents have become suddenly unwell. I paid for my friend and her kids and I all to go to Disneyland a few years ago, which they could not have done on their own. I'm open to fostering in the future.
In the meantime, I sleep in till 10 on the weekends and then wander to my home gym that would otherwise have been a kids bedroom then head off for spontaneous lunch with my husband or a child-free friend, then spend my evening researching our next holiday to the Maldives or Japan and buying overpriced designer shoes online 🤷♀️