I'm not convinced that this is something that should change either; being much more independent from Wine than e.g. wined3d is was an explicit design choice when vkd3d was created. We'd like e.g. the shader compiler to be useful to native Linux applications, and we'd like people to be able to contribute to that without being particularly concerned about e.g. building Wine.
In theory, sure. In practice the only user and contributor is Wine, so it seems to make more sense to prioritize that usage, even at the cost of slightly complicating things for some hypothetical non-Wine contributor.