Hello,
I think there might be a little misconception in the Element Geometry component.
Elements output is the same as input - Excluded elements are ignored. The Geometry output is working fine. This provides a situation where the Elements output description is misleading.
Actually, if it would work correctly it would be a very handy way to exclude certain Elements.
You are absolutely right. The output Elements should only list the elements that are used to output geometry. I submitted an issue for this