Even in their example "turn the surfboard red", with a bounding box around the surfboard, it turned the whole surfer's wetsuit red too. Things are never quite going to get there.
Me, casually scrolling on my phone, don’t
I have no way of knowing that you wanted the image to have a red wetsuit. I would just assume its a real image of a surfer in a red wetsuit
Nothing in life is ever perfect. Doesn't mean imperfect stuff can't have a lot of impact.