I've gotta say out of everybody I know even my 80+ year old grandpa - your phone notifies you of the least. Idk if you're in a contest here but that's just now how most people's lives go. Most peoples lives are engrained with their phones and I think most of us are healthy enough to make it be a net positive. (Not implying anything you're doing is wrong!)

I'm not defending or justifying doing it - im simply explaining why it's such a common phenomenon. People are often in conversations all day long with others. Or engaged in online discussions like this. Life is filled with boring moments and phones alleviate us of that. That's why people do it.