That depends on the display and the rest of any items in the signal chain that have an influence on picture.The question is, should that shadow detail be shown, or have they fudged the gamma to give a subjectively 'better' picture, but not actually showing things how it was intended?
Well no-one should be using artificial sharpening; and that's not what I'm referring to when I talk about detail.I'm sure there are players that have profiles, even ones that set them as default that boost sharpness, contrast, colour etc. Doesn't mean that's how it's supposed to be shown.
The point of calibration is to assess what the entire video chain is doing, and how that is affecting the picture. Then it's a question of adjusting the available controls to get the optimum picture quality. That's a very different situation from just "more".
In the absence of some good diagnostic tools then yes, it's a safer bet. It does tend to apply more to displays though than source devices.The correct setting for most players and in fact most displays is disabling all the extra processing.