Same reason why those who were around before the advent of the smart phone are able to properly hold a conversation with others in the real world, or have attention spans that last longer than 30 seconds at a time. It's the same reason why certain individuals who were around before the days of the digital age have a fully-developed sense of empathy and sincerity in regards to others. Necessity is both the mother of invention and adaptation. Of skills and the the wherewithal needed to traverse certain tribulations. No bird of prey would need to fly or have razor-sharp talons if all the food came flocking straight to its gullet.