I get that with nieces and nephews. And the crying. And the diaper changing. And the sullen teen angst. And pretty much every other experience.
Pretty much life as it always was... Sounds to more like people are stuck in a comfort zone Or in a TV world of the 80s/90s with sitcoms like full house.
My point is, I can get the full experience (namely the called out smiling) without them being mine.
I can tell you from experience, it is different if it is your own child.
And, as much as I don’t have the experience to say how my life would be different with a child, you appear to lack the experience to know how your life would be different without a child.
I have over 25 years of childless adult life, an experience many of my parent acquaintances don’t - can’t - have. It’s been a fulfilling life.
That said, I appreciate the sentiment. Thank you. :)