Operating Systems are not a very well defined subject. Linux doesn't include a UI layer for instance and that isn't considered a problem. Being tied to a particular experience limits the potential applications of the OS, so in many ways I would consider the lack of opinionated experience a good thing.

There is now a UI experience available as part of Fuchsia in the workstation product, but I wouldn't overly index on it as it's just one take on what you could use Fuchsia to build.

You’re probably right, though for an OS that’s the kind of dependency people would prefer to have removed anyway.