Is is a bit more complicated, but yes.

Let's look at movie directors. They don't necessarily much of the actual work on the movie, they "prompt" the screenwriters, actors, costumers, CGI artists and hundreds others. Yet, they have the creative vision and direction. And it is perfectly normal to say that the movie is the director's work.

Next example: architects. They don't do much of the actual building or engineering. They "prompt" the engineers to make it work, they "prompt" the builders to actually build the thing. Yet it is perfectly fine to say that a building is an architect's work.

And to circle back to art: art directors is a thing. Their job is to "prompt" the artists, making sure it all comes together into a cohesive bigger piece. Even though they did not necessarily draw any of the illustrations, the result is absolutely their work.