I try to explain by shifting the focus from neurological to musculoskeletal development. It's easy to see that physical activity promotes development of children's bodies. So although machines can aid in many physical tasks, nobody is suggesting we introduce robots to augment PE classes. People need to recognize that complex tasks also induce brain development. This is hard to demonstrate but has been measured in extensive tasks like learning languages and music performance. Of course, this argument is about child development, and much of the discussion here is around adult education, which has some different considerations.