I felt a bit like you. I didn't really like children - and still don't especially, apart from my own. I valued all the things I could do as a childless person. My DH felt the same.
And then I changed my mind and decided I would like a child. It was because I did feel I would have a sense of having missed out on one of life's big and irreplaceable adventures if I didn't. DH and I had always said that if one of us really wanted one, we would try....so we did.
Having a child does change your life, without a doubt. Not having a child isn't wrong or a lesser life or anything like that...but it is different. I think it's true that you rarely find people who say they wish they hadn't.....and it's all about the child being a real human being with their own little personality....once they are there, they are no longer the faceless, theoretical child, but an actual person you have a relationship with....and once people have that, they wouldn't be without it.
That said, in the first 3 months of having a baby I did wish I hadn't. I had PND and found the 24/7 nature of it all just overwhelming and unbearable.....but this phase passes and as my DC have got older, I have found things just get better and better. And DH is besotted and wouldn't be without.
I would say, if truly one fence...do it! Chances are you wont regret having this amazing experience which will be something for the rest of your life. If you feel you definitely do t want to, then fine of course....but if wavering, seine the opportunity which brings people so so much pleasure.