Can't resist the urge...
If John Doe died from Lung Cancer, I would like to have his name appear in the Subcategory List of "Lung cancer deaths". I would also like to see his name appear in the Main Category List of "Cancer deaths".
And I would prefer to not have both categories. People (with few exceptions) are not known for dying from cancer and in 99% of all cases this fact is totally unrelated to the reasons they are known for.
This is not a categorization in the sense of a usefull navigation aid, or for forming a systematic hierarchy of articles. It is an exercise in knowledge representation and I fear it will only stop, when every sentence in every article is also represented by a category membership.
Regard, Peter