I think this misses the point I was trying to make. Both an open source game and an open weights LLM include the necessary assets. But people seem to be saying, “you need everything that was used to create the assets”. For game art, that would include sketches, prior art used as inspiration, project files that aren’t used by the game engine but were used during the design process, and so on - if you apply the same standard. But I don’t think anyone does.
Similar to this I've never seen a project request anyone license their github PR comments under any license whatsoever even though they're undoubtedly copyrighted and used in the creation of the actual source code.