Ah. That's interesting. I knew it was used with the Spyder gallery app but didn't realise it was solely for that and didn't impact other aspects of the device.
Back to the question of why people would want to use this new PS app on an uncalibrated screen then. And as far as PS being used for other things, while that's true, Adobe is not billing this new app as such. It's squarely directed at photographers on the Adobe website.