It doesn't need to generate everything. It only needs to be marginally better or more efficient than a human for it to start generating everything humans need when needed.

Edit: left the page open for a while before responding, and the other person responded with basically the same thing within that time.

If human need drives the creative process, then there will always be a human in the loop. Instead, each human becomes the “random seed” that initialises the process based on their own unique make-up. This is only different from how things work now, in that humans are also creating the artefact.

Similar to how synths meant we no longer need to play an instruments by plucking strings, it hasn’t affected the higher level creativity of creating music, only expanded it.

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.

Depends what you mean by creativity. In some ways, AI is not creative at all, everything is generated by mapping text to visuals using diffusion modelling via a shared latent space. It has no agency or creative thought of its own.

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.