I read an article[0] on the subject the other day. At some point it said that some art tools are inherently easy to use. Part of the difference between an amateur and an actual artist is in the mastery of such tool.
Think of a phone camera for example. It's extremely easy to take more than decent pictures with it. But it takes a good photographer to make art with it.
Bringing it back to the topic at hand it means that yes, describing what you want to see to this kind of software is easy on a basic level. But you get a picture that looks like any other. Instead, you need to speak the language of the software to obtain a better materialization of your vision, and that requires some sort of mastery of that tool. That would be the difference between an illustration made with stable diffusion and actual art.
[0] https://www.indiscreto.org/non-fa-tutto-il-computer-il-ritor... (in Italian, sorry)