I don't know how likely it is, but that's the mutter from the gutter.
Not the best way to set sharpness to be frank. While it might superficially sharpen up a poor SD image, in reality you will be adding a lot of artificial edge enhancement and ringing.If I freeze the SD image and start playing with the sharpness, then sharpness at 82 is the best image. Then stand at a distance of 1 meter. HZ1000