The path they took to get to this pledge feels very similar to the path anti-vaccination advocates took (ie something intuitively "feels" bad -> look for eviden

The path they took to get to this pledge feels very similar to the path anti-vaccination advocates took (ie something intuitively "feels" bad -> look for evidence to support that). If a study came out that showed evidence that having a smartphone at an early age actually improved educational outcomes, do you think these people would reverse their position? I would guess not because above all else, this is a value judgement ("These devices are quickly changing childhood for children. Playing outdoors, spending time with friends, reading books and hanging out with family is happening a lot less to make room for hours of snap chatting, instagramming, and catching up on YouTube."). And to be clear, there is nothing wrong with a value judgement. But trying to foist your values onto others is not something feel the need to support.