(but well, I love the web, so I'm not completely out of the world :) )
Like other types of addiction, some of us may be weak to those generated by the smartphone era (associated with a certain socio-cultural mindset based on fame, social validation/gratification).
Like the parent poster, I'm an old fart. But my daughter, in her early twenties, have much the same pattern, and most definitely no addiction to either phone or social media. For what it's worth, she's had pc and phone for about as long as she can remember. With internet and no control, but a lot of guidance.