Not all medicine is relevant to a patient. Just because quinine helps prevent malaria doesn't mean that I need it in my antibiotics if I don't have it. Some patients need terpenes to aid in the metabolic pathway and in achieving many of the common effects of being high...but many don't.
Example: My mother stands to benefit from THC, CBN, and CBG lowering her eye pressure. The inclusion of terpenoids/flavonoids tends to have an increased effect on reducing blood pressure (which is bad for her) as well as makes her feel high which is not something she tolerates. I would much rather give her tiny doses of a decarboxylated oil which has lost many of these compounds to heat.
Terpenes are not a gold standard and I think there's a bit of an obsession going on with them. Yes they are what gives smell, flavor, potency, etc., but you have to remember that there are HUNDREDS of compounds in the plant and only a handful of them are known to do anything in particular. Just as I would not smoke the bark of a cinchona tree to get quinine into my system, I would not smoke weed or shatter just to get thc in my system if it were a matter of life and death. The problem: it often is.
