AI will not be able to generate everything for us. Just the things that are able to be explored by humans and hopefully a tad bit more. AI is already more creative than humans by a lot of measures.
Humans have demonstrated time and again, even things beyond our experience can be explored by us; quantum mechanics for example. Humans find a way to map very complex subjects to our own experience using analogy. Maybe AI can help us go further by allowing us to do this on even more complex ideas.