I think in previous generations women were often more used to being around kids and babies as they were expected to help out with siblings etc.
Definitely.
I'm the eldest of 3 kids and umpteen cousins, I've been looking after babies and kids since I can remember! Albeit supervised initially (sort of!) as a result I'm used to babies and young children I'm rarely phased.
My ex was the youngest of 4 kids and the youngest cousin. Dd was the first newborn he'd ever held and he was in his late 20's when we had her! He was very nervous, very anxious about doing something "wrong" from how he held her to changing nappies, to bathing her. Much hilarity ensued as he learned these things and he'd get very apologetic to me when little mishaps occurred like
he splashed her face while bathing her and it startled her and she cried which he later described as "nearly drowned her"
I also didn't "jump" every time dd so much as murmured, I'd wait and see if she'd settle herself back first.
I've noticed it with others of my generation and definitely younger ones too, unless they too are from a large family.
Dd is an only on my side but has 5 brothers on dads now with another on the way.
But she is also the eldest cousin so she was raised used to being around my brothers and sisters kids and caring for them so she's similarly confident with babies etc
Her best friend from school is the eldest of 4 and again the eldest cousin so she's the same.
When they first became friends it puzzled many inc me and friends mum as on paper they'd nothing in common
Dd - only child, single mum, not born and raised locally, not raised Catholic...
Best friend - large family, parents married and still together, born and raised locally, raised Catholic
But when we eventually met and got chatting at a school play the other mum and I discovered they'd a lot in common -
Both used to large families, dd is from a Catholic family just not raised Catholic and the main thing - we had similar parenting styles which was a surprise as I'm 10 years older than the other mum. The girls were at this point trying to persuade each set of parents to let them do a thing that others in their group were being allowed to do by their parents and we'd both categorically said no! And for the same reason. This led to discussion on other general parenting decisions - curfew, pocket money etc and we had the same opinion on the vast majority of things. As time went on we didn't always agree but we rarely had completely different opinion/approach to parenting.
Even now there are people the girls meet locally who don't know them and the history and assume it's an "opposite attracts" thing and it's kinda become an "in joke" that they explain that they had very similar upbringings despite on paper appearing not to have
Fwiw I would have loved a big family but couldn't have any more after dd