One of the things not talked (much) about is how families are much more isolated now - since the average person is from a two-child family, and has a two-child family, most of their peer group growing up and when they have kids is in the "same boat" so they don't really have insight and experience of what the youngest years brings.
Even the basic idea of "kids like games, make things games" that permeates Bluey is likely unknown to many new parents.
Absolutely, it's one of those things where you're truly thrown in at the deep end, so to speak, with no guidance or experience (you likely remember little to nothing about your time as a child in those early years) and have to work it out.
Nobody teaches you anything (besides some basic courses for new parents like NCT here in the UK) and there's really no-one to ask; your own parents likely did things very differently to how you would now, so you have to weigh any advice they can/do provide.
The biggest help, I've found, on all sides, is talking to other parents; those of our children's friends, and we're quite friendly with a bunch of them having spend a lot of time talking to each other during COVID and meeting for the children's play-dates after. Many of them, like us have two children, with a similar age gap, their eldest is the same age as we met at our first children's births and they go through the same phases at roughly the same time.
Sometimes you just need to ask, "is this normal", and they'll corroborate, and some times you just need to support them by confirming you have the same challenges.
I completely missed your point, I think. Do you mean that the current generation of young parents didn't experience enough things being games as kids themselves?
My interpretation was that we haven't experienced it as adults; We may have experienced it as children, but my experience (maybe not everybody's) is that I don't remember enough about being a young child to necessarily know the best way to approach things with my own children, and we haven't necessarily seen how others do it.
I'm also much older (a decade) than my parents were when they had their first child.
My wife tells me a story about a young lady in one of the baby groups who was looking for other mothers to get to know.
She's a selfless woman my wife, and goes out of her way for anyone, but she felt bad that she just couldn't get a long with this young lady to the point where she'd exchange numbers and arrange to meet up for coffee or whatever; while the young lady was also feeling alienated from her childless friends.
There were almost two decades between them and she just couldn't find anything to relate on and she felt really awkward; she still thinks about that occasionally and regrets not trying harder.
I'm the voice of (un)reason and have to reign in her selflessness sometimes for her own wellbeing and had to convince her she had herself and a new born to take care of first and foremost.
My earliest memories, sketchy and faint, are around eight or so years old.
By that time my youngest sibling was already out of diapers; I had literally zero experience with newborns and had changed ONE diaper in my life before the hospital shoved one in my arms and said "good luck, don't shake her."
Larger families of yore, the eldest kids would be in their teens when the last baby was born; they would have living memory (and probably even were enlisted to help). And as others have mentioned, you don't really begin to meet the parents of your children's friends until they're old enough to have friends, which is usually daycare at the earliest; often school for many.
You have to make an effort and action to join a "mom's group" these days; before local family, church, even the neighborhood would spontaneously be a "mom's group".
Even the basic idea of "kids like games, make things games" that permeates Bluey is likely unknown to many new parents.