This is true but also your API needs to actually implement all the use cases (often its only for a subset) and it needs to work well (often there are many nuanc

This is true but also your API needs to actually implement all the use cases (often its only for a subset) and it needs to work well (often there are many nuances or inconsistencies). But I agree there are lots of overlap. No need to completwly reinvent the wheel here. Actually CQRS systems work incredibly well with LLMs already.