My understanding is that the per game profile will default to a standard system wide set up until you then tweak the settings. Once you tweak those settings whilst in a game (and you’ve got per game profile set to on), these settings will be saved for this game the next time you open it.
This means you can set up your own settings for each of your games - Steam doesn’t provide you with a per game default profile it’s just a default system wide one.
My understanding is that the per game profile will default to a standard system wide set up until you then tweak the settings. Once you tweak those settings whilst in a game (and you’ve got per game profile set to on), these settings will be saved for this game the next time you open it.
This means you can set up your own settings for each of your games - Steam doesn’t provide you with a per game default profile it’s just a default system wide one.
Hope that makes sense.