can I be blunt

I am probably going to get so much crap for this but I am serious when I ask this:
Why are people posting things about their child doing the most basic random shit? 
Ex: "Johnny can breathe"
 Or "Sally can blink"
What is this? Is it a new trend that I just can't comprehend? 
Like don't get me wrong I know it's exciting but seriously? 
Go ahead bash away