But yea, simply having a smartphone around makes you want to fiddle with it. I would guess there is some addictive component there, as it impacts nearly everyone.
That's by design. There's a whole science of making the customer come back over and over again.
The smartphone and social media often feels like a glorified Skinner box.
Humans like to feel connected, like to know interesting things, and like to feel engaged, and so on. And this little magic box pumps a lot of reward for just a few tiny taps. Just a swipe, and new shiny spectacle things happen, woo! One more swipe!
And you see other humans on Facebook. For some people that's addictive. For others learning about new gadgets, for some simply learning (duolingo, coursera, audiobooks), or checking the news, or reading a book, just one more page while I wait for someone to go back for something in the shop/car, etc.
It seems like that's a regression in design. Only notify me if something goes wrong, don't notify me if things are as they are supposed to be.
Now I've set the "Quiet Hours" setting to permanently on so no notifications are permitted.