But I also have friends and relatives who are child free by choice and I absolutely respect their choice.
Though I must be honest that at least half those I know who have chosen to be child free have done so for less than happy reasons too. A mixture of health factors (genetic issues there is a strong possibility of passing to any biological children), dysfunctional family history and/or doubting they would be good parents, a couple it wasn't what they planned particularly but they didn't meet their life partners/spouses until later in life when a pregnancy would be highly unlikely and/or high risk and they didn't feel it worth the risk.
The others have been honest that they just don't want to have DC, which is not only a perfectly valid decision, but also brave given the societal pressures and absolutely correct as every child deserves to be fully wanted and loved. However, interestingly even a few of these - as we're entering menopausal age - have found they've wondered if they made the right decision. But I suspect that's a combination of hormones messing with heads and the perfectly naturally psychological response to reaching that stage.
"I essentially made a person who I can shape to be like me" be careful what you wish for - all those Facebook memes about children getting their sarcasm from their mother etc tend to come home to roost in teen years😂😂 a friend recently shared one tagging me and dd - something like 'i sometimes struggle to see my likeness in my dd...then she opens her mouth and I'm like - yep there I am!' - dd looks NOTHING like me she is the absolute image of her dad, we barely look related! Completely different build, colouring, features... But oh my she has my "turn of phrase" - not always a good thing!
"Once they get to secondary school, they are much better" I very much often feel an "odd one out" on this score, lots of people seem to like primary school stage, it's actually my least favourite. I love baby and toddler stage and early to mid teen stage (though admit my view on that may be coloured as I'm currently in late teen stage). My volunteering has mainly been with teens and I get on very well with teenagers.
"it amazes me that some people who are naturals with interacting with kids don't want their own." Depending how well you know these people, it may not actually be a choice, I have a few of my close friends/family who "publicly" as in to everyone except those closest to them say they are child free by choice because they don't want to have to explain the many years of ttc, being unable to, ivf, multiple mc etc they've been through. Not saying true of all of them, but certainly worth bearing in mind I think.
Although to balance that, I also know people, especially older friends/family who were child free by choice but because of the comments that would likely invite from certain people they have said they can't have DC. Controversial I know but the people I know personally like this I can understand why they've done this.
I also know people who probably shouldn't have had children but who either caved in to pressure (either societal or from close family/friends often both) or who fell pregnant unexpectedly and it was either before abortion was available, or when they learned they were pregnant was too late to get abortion or were pressured to keep said pregnancy by partner/family/religion/society.
"For some people however the only thing more selfish than not having a child is having only one and we have had criticism." Yep! I've definitely had shitty comments of this kind, possibly more hurtful as only having one wasn't my choice?