Genuine creativity is something LLMs struggle with and it kind of makes sense given their design. If you have a complete plan for a feature or even just an idea what the feature should do, that is enough for an LLM. But asking it to think and come up with a new feature idea by itself will always yield mostly extereme basic things you've already thought of. That creativity of "what" to build so it serves a purpose is still very difficult imo and LLMs are not good at it.

This is exactly why I have no interest in LLM created music, stories, movies, etc.