for some people I think there's an attention seeking element. They relish the expressions of surprise when they deign to tell people they had a baby...three days ago.
I'm sorry but I think this is really narcissistic.
One thing I've noticed over recent years is the amount of people who assume that anything anyone else does is aimed at them personally. It's just so me me me, and I think it's liked to social media and maybe Covid. So many people have Main Character Syndrome and act like everyone else just exists to either impress or frustrate them. You see it on MN, "oh woman who prance around carrying coffee cups and pretending to be busy are just doing it to show off and make SAHM feel bad" - no one gives a fuck about you, why would they?
The truth is, most people are preoccupied with themselves and aren't thinking about anyone other than themselves and their immediate commitments and priorities.
I know that whenever I've felt that someone was snubbing me, it turned out that they were just preoccupied with other stuff and I simply wasn't in their mind at all (which hurt a lot more than being deliberately snubbed). And whenever someone has accused me of snubbing them, it was someone I literally hadn't thought about, or had maybe fleetingly thought "crap haven't texted that person, guilt guilt guilt, add it to to-do list, procrastinate, forget."
It's narcissistic to think people are snubbing you on purpose or doing stuff to impress you, because you're inventing and projecting a huge amount of self-importance onto those people and imaging that stuff they do is aimed at you personally when you're obviously not a major person in their life.
In reality most people think about themselves, and simply aren't thinking about you at all. It's a tough lesson to swallow: you're not as big a factor in other people's choices as you think you are.