All seed bearing plants were declared by God to be, "Good. Indeed they are VERY GOOD."
(Gen. 1) That would include, marijuana, poppies, coca and a host of all sorts of wonderful plants which are used to extract very useful products which enhance the lives of all sorts of humans.
They are only 'illegal' because some people got licenses and patents from the same government which hates competition as much as the license holders. Wake up people.