Effort. You can create a field called the “philosophy of this rock sitting on my lawn.” And this field would fit your definition of philosophy. But there is a clear hierarchy here that is not being obeyed.
Religion from certain perspectives is just made up stories. Should these made up stories be made into a field of study that is a sibling branch of science? Call it the study of religion or made up stories, no point in calling it a philosophy and giving it the same weight as science.