Sadly, a divergance over this issue appears to have been a major cause of my brother breaking up with his very-long-term GF.
My wife and I have a baby, and so does my other brother and his wife - both arrived at pretty well the same time. My childless brother really grooved to being a double-uncle; his GF was clearly of the “I’ll never have kids” camp - you could see it in how each reacted to the babies (my brother’s face just lit up seeing 'em and he couldn’t wait to cuddle 'em; his gf - well, there’s a pic of her holding my baby - at arm’s length, and with an unhappy look).
I think this triggered thoughts of having babies in my childless brother, which were clearly not shared by his gf. Thus, they split after 12 years, though they obviously cared for each other, as that’s a pretty fundamental incompatibility.
My thoughts on the matter? Neither is right and neither is wrong; what is sad, if not being with someone who shares your POV. Those childless couples who, together, make the decision not to have 'em and are both cool with it - great; and great to those who both decide they want 'em. Sadly, some change their minds over time. But it is the lesser of the tragedies to regret not having them then to regret having them - the latter is sad not just for yourself, but for the child as well.
Being a dad myself, I can see that it is not for everyone. I think it is great, myself, and I’ve never regretted it; but it is a tremendous lot of responsibilty, worry and work; it changes you life in pretty fundamental ways. I’ll readily admit that my reasons for wanting a kid were selfish - I wanted to experience all that life has to offer; I’ve already done the “I’m a guy in his 30s with some money out to have a good time” thing; I did not want to settle into a comfortable rut, with my books and my cats, like so many of my childless friends; I wanted to re-experience the fun of learning through the eyes of a child. But once I actually had the kid none of that really mattered; I think there is a biological change that takes place, making the focus in your own mind less on what you want and more on the child. Thge child isn’t an accessory to my lifestyle and personal growth (as looking back I sort of naively assumed), but rather more the other way around - which is as it should be.
Which isn’t to say that all that stuff didn’t happen - it did - but rather, that it was no longer the point.
All of which is a long-winded way of saying that either decision (to have kids or not to have kids) is, I think, made for selfish reasons - but the results may not be what one would expect.