The model behind Stable Diffusion (or Dall-E) is not infringing itself. It has the latent images it, but there is nothing that you can point to that says "that number there is infringing."

It takes a human action to pull together the parts of the model and select what is right and craft the prompt. Asking for "a picture of Mickey Mouse in the style of Pixar" is all sorts of infringing - by the person asking for that.

By itself, that image isn't a problem any more than the doodle in my notebook is. The question is what the human does with the image. If they publish it or try to sell it - yes, that's a problem. If they hang it in their kids room, yes, its infringing but unless you invite a Disney lawyer over for a play date no one is going to care (this also applies to if you drew it yourself rather than instructing a program to generate it).

My (I am not a lawyer) take is that the model isn't infringing. Use of the model may be infringing, and issues of infringements should be taken up with the human who created and published it them just as if it was done by a painter drawing heavy inspiration from a style or a photographer with a photograph of the Eiffel Tower at night.