I've seen a graphical designer struggle to use an analogous product. They tried prompts like "remove background from this photo of dancers, don't change their face": the model couldn't do it: it always changed the faces at least a bit. In other words, the model was not removing the background, instead it was generating the whole picture anew, but without the background, which not only seemed inefficient, but was also way too lossy.
I wonder if this model could finish that task.