Who says we can't provide those interfaces to the container?
My view of it is less like containerization to provide complete isolation from the host/guest, but instead containerization to make the whole game a single 'entity'. Want to move the game from one system to another? Copy the container, that is where everything exists. No running around your filesystem looking for where the game decided to drop random files. Modded out the game and you break something? Just roll back the container.
That looks like a grossly over engineered version of what I would like.
Sidenote: I've been a linux/Mac user for a few years now and recently had to work on stuff for the Windows side of things. All I can say is: wow. what a disaster. documentation is a complete nightmare and there seem to be 14 different versions of anything all fighting to do similar things. dead ends everywhere.
My view of it is less like containerization to provide complete isolation from the host/guest, but instead containerization to make the whole game a single 'entity'. Want to move the game from one system to another? Copy the container, that is where everything exists. No running around your filesystem looking for where the game decided to drop random files. Modded out the game and you break something? Just roll back the container.