The point holds for anyone injecting several times daily. With only a GLP medication the 48-hour minimum rest between shots prevents tissue buildup, so rotation is unnecessary. Certain compounds still cause welts or irritation in specific belly spots, so those get moved to love handles or glutes while others stay in the same zones.
The basic idea behind rotating sites to limit irritation, lumps, and uneven uptake makes sense. Still, that advice often comes from people taking multiple daily shots, whereas weekly or every-five-days use leaves plenty of healing time. I just switch sides of my navel in the stomach area and skip arms or legs entirely. Has anyone ignored rotation completely and run into problems?