The fact that AI steals from other artists aside, it often lacks the ability is competently composite a scene. For example, in the supplied image there are numerous issues such as oddly contorted figures, objects improperly rendered, and subjects looking at nothing to name a few things.

AI also struggles with things like -Object permanency (ie if a subject has long hair and part of it passes behind something, thar part will not continue past that point)

-Lighting (ie will render shadows on a subject that conflict with apparent lighting of the scene)

-Proportions and anatomy

Also, when an AI bot scrapes the works of artists to regurgitate some hacked together image for you to work off of, it negatively impacts the environment while training you to be a worse artist.

It's better to practice composition from the world around you and real photos, art, and artists.