To clarify, I didn’t say that having children was a phase. Having children is for life!
What I meant was, life can (broadly) be seen as a progression of phases, growing up, entering work life, meeting a partner, retiring etc And childhood stages also follow phases... newborn, toddler stage, pre teen, teenager etc
No one is saying it’s not possible to mix them up, do them in a different order etc - simply that the idea of ‘re doing’ a phase to somehow do it ‘better’ (which is how the OP described it) is anathema to many of us.
I’ll readily admit though, that having a career in education I’ve come across too many families where mum has another kid or two after a lengthy age gap and it can often be very unsettling for the teenage kids who are going through the adolescent stage, and frankly in some cases the parents aren’t making a better fist of things second (third, fourth) time around.
Not saying it’s always like that (as some posters have said, they have huge age gaps and it’s all wonderful) But I would beware of having more if it’s about an unresolved feeling of wanting to do it ‘better.’ I’m sure it’s very natural, after bringing up your children with as much love and care as you can, to think ‘oh if i had my time again I’d do x,y and z.’ Chances are however many children you have, you’ll always feel like
That, because raising kids though wonderful and life affirming is never ever ever going to be ‘perfect.’