And docker misconfiguration causing issues in unrelated services is one another reason why I'd suggest they have their own.
Same would go for any console, phone etc. You can’t just install stuff with known issues from 3rd parties, not file report with any diagnostics and then blame it on the platform. Would you blame iOS for a badly behaving app that makes it hard for the kids to use the iPad?
So again, for the huge number of people whose life involves technology there are a lot of things that can throw a wrench into that PC for gaming, and in those cases a console makes a lot of sense. It's a little odd to me that this bothers you so much; surely it is expected that consoles have a good usecase given their popularity?
xbox apps on Windows do not care about virtualization, in fact they probably can't - because xbox os is essentially a subset of windows as host and guest.
None of this is relevant. Maybe Docker's interface is "improperly configured" for the gaming use case. It remains a headache, and using a console is a viable solution that allows you to work with buggy instances of Docker without disrupting your gaming.