Why Don't Cameras Highlight Motion Detection?

Just came across this video, where the camera highlights motion in the scene in orange, making it very visible in the nighttime scene it's showing:

This is common in video analytics, with bounding boxes around detected objects being more or less standard, but I've almost never seen it for simple VMD (I believe Samsung has an option for it). It seems like highlighting motion would make things more usable for operators, drawing their attention more easily, and would assist in troubleshooting if you have a lot of nuisance motion.

That being said, highlighting objects in orange seems it would obscure their actual color and potentially some details. If that's the only stream being recorded, it could reduce its usability forensically.

What are your thoughts? Have you seen any other cameras which highlight motion?

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