What does the sentence refined oil is not a natural resource because people make it mean?

The statement implies the speaker has no concept of the term "natural resource". Wood does not stop being natural resource because it is made into paper or chairs, fish does not stop being a natural resource even when it is filleted to becomes supper. In the same way separating crude oil into its components (refining it) or using those components to make plastic does not stop the crude oil from being a natural resource.