David,

The pharmaceutical companies can't patent the oils so they can't make any money from them.

Actually the medical industry has funded and published quite a few trials into herbal medicine. Some treatments- such as St John's Wort for mild depression- seem to be effective, with few side effects. The pharmaceutical industry immediately responded by packaging it for wide distribution and sale, and many/most doctors would be agreeable, as long as they can be sure the patient is not clinically depressed. Science has also found that many herbal/alternative products make no difference at all, but the pharmaceutical industry nevertheless packages those products for sale as well. ;-)

The issue is not that doctors are opposed to oil or that the pharmaceutical industry can't profit from it, the issue is that there is no study comparing 1000 people who got the special oil with 1000 other people who got oil that looked exactly the same but was only olive oil, with the "good oil" people doing significantly better. If there was such a study, I guarantee there would be 10 different types of "Spur oil" available in your pharmacy, and your doctor would have a free sample for you to try!