Not the parent, but remembering my reading of Dennett, he was referring to the tricks that we got through evolution, rather than ones we invented ourselves. As particular examples, we have neural functional areas for capabilities like facial recognition and spatial reasoning which seems to rely on dedicated "wetware" somewhat distinct from other parts of the brain.
But humans being able to develop new tricks is core to their intelligence, saying its just a bag of tricks means you don't understand what AGI is. So either the poster misunderstood Dennett or Dennett weren't talking about AGI or Dennett didn't understand this well.
Of course there are many tricks you will need special training for, like many of the skills human share with animals, but the ability to construct useful shareable large knowledge bases based on observations is unique to humans and isn't just a "trick".
