Really the hardest thing with art is details and usually seperates good from bad. So if you can sketch what you want roughly without skill and have the details generated, that's extremely useful. And image to image with the existing diffusion models is useful and popular.
I have no idea about your background when I am commenting here. But these are my two cents.
NO. Details are mostly like icing on top of the cake. Sure, good details make good art but it is not always the case. True and beautiful art requires form + shape. What you are saying is something visually appealing. So, the reason why diffusion models feel so bland is because they are good with details but do not have precise forms and shape. Nowadays they are getting better, however, it still remains an issue.
Form + shape > details is something they teach in Art 101.