The most common use case: a headshot client wants their photo on multiple backgrounds. You photograph once against a neutral backdrop, process the cutout, and composite over white, grey, blue, and whatever else the client requests.
The value to the client is real. A single photo session with five background variants is worth more than a single photo. You charge once for the shoot and add a small fee for the variants.
The workflow is fast. Photograph, process with Remova, composite in an editor. Ten minutes per client adds a deliverable that most photographers do not offer.