Most AI course creators start from a topic and produce a plausible course about it. That is the wrong starting point for a school, a university department or a corporate academy, which already has a syllabus, learning outcomes, a house style and assessment rules. The useful tool starts from those, and the output is judged against them.
So curriculum design stays human. The teacher or instructional designer writes the outline and the outcomes; the system drafts lesson plans, slides, reading guides, quiz banks and rubrics that map back to each outcome, and flags any outcome no draft covers. Every factual claim cites the source document it came from, so a reviewer checks evidence rather than rereading a textbook.
The time saved is mostly in variants: the same unit at three reading levels, translated, captioned, with alternative text and WCAG 2.2-conscious structure. That is work that is rarely done by hand because it is repetitive, and it is where accessibility usually falls short.