We use the whole plant too. If it's not used for smoking and cooking, it'll be used in a topical pain reliever, or for compost in the worm composter. Then it'll go back in the soil for future grows. We even gave the main stalk to the rabbit to eat, digest, then his droppings go into the composter to make nutrient rich castings. We have the circle of life going with it. We love it. All the plant gets used here.Every inch of the plant, from the soil line up, is covered with trichomes, most just one cell high. I believe the trichomes on the fan leaves are slightly different from those on the buds and again from those on the stem and branches. I use parts of the whole plant when I make oil, because I want as many different components as I can get in there.
You can save trim and make butter or cooking oil with it. It's not as potent as made with bud, but it still has medicinal value. There are many patients who juice fan leaves, freezing extras so that they have a supply all year round.
There's not a part of the plant that can't be used to benefit somewhere. The stems and branches can even be used as smoking wood in a cooker.