People exchange their real world for what's on their screen the phone is a tool, nothing more, but people tumble into them and place so much importance on them and make excuses (they see as valid) for why. They live through other people's (usually fake) lives and justify it by saying, I'm keeping up with friends and family, all the while failing to live their lives.
I have no problems with a phone being used as a tool, like a carpenter uses a hammer, or how toilet paper or a shoe is used...but when it becomes someone's world, that's not so good. And yet, people exchange their real lives for the fake and inconsequential world the fall into on their phones.