The point there is that you can make a computer that's very good at predicting StackOverflow results or Jeopardy, but it won't be able to tie a shoe. If you want computers to be skilled at living in the real world, they have to be trained with real-world experiences. There is just not enough information in StackOverflow or Jeopardy to provide a meaningful representation of the real world. You'll end up overfitting to the data you have.

The bottom line is that without sensory input, you can't optimize for real world 'general AI'-like results.