Anyone ever measured how much time it costs to create all those Anki cards? It seems it would considereably more time coming up with the questions than reading the new information. Prep time > learning?
Many people consider the prep time to be valuable itself as it usually involves you gaining understanding. That said, I don't really buy that argument and the vast majority of my cards these days are auto-generated using https://github.com/kerrickstaley/genanki.