There is no way that the internet is solely to blame for a child's creativity and imagination dying. Think about the billions and billions of creative projects on the internet.
I'm afraid that what you've done with that line is sort of romanticize some fictional past where kids were kids and men were men and women were women. There was always something that people tried to blame the death of creativity on - when I was a kid it was TV. When my grandfather was a kid, it was reading and books.
While I agree that "social" media is destroying many social conventions, I absolutely disagree that the internet is to blame for killing childhood creativity.