--geometry-only option is confusing
Here is the current descritption of the --geometry-only option :
For certain "full scene" file formats (gltf/glb and obj), reads only the geometry from the file and use default scene construction instead.
I think this is not great, we may want to force the usage of the "default scene" with --geometry-only even with importers that do not have associated readers.
Edited by Mathieu Westphal (Kitware)