This is how it works in Australia. Doctors are taught at Uni mostly about the drugs, not about alternative therapies. Even most home remedies are no longer taught at Uni.
Once they graduate and are practising, particularly for GPs, they are bombarded by drug company reps trying to convince them to use that company's drugs. With the number of types of new drugs, and number of companies producing drugs, they do not have enough time to go do all their own research.
The drug companies only provide/quote clinical trials that are favourable. I have seen interviews with doctors who provided negative reviews which were not included (sorry, no longer have the references).
In addition, many big clinics are now set up with profit as the real goal, dictating maximum times to spend with patients, and rewarding based on highest number of patients seen.
So, what do they tell patients who walk in every 15 minutes asking for help? Where do the doctors go for information? There is also the issue for some of saying "No" to the patients who walk in asking for drugs.
Having said that, there are still many doctors around who manage, despite all the impediments, to put their patients first and only medicate when necessary, and only the minimum. There are also many doctors now working with alternative medicine/therapy practitioners. Some already had open minds, but some have had patients come back and show them the results of alterntative medicine when modern medicine could do nothing for them.
I used to be a practice manager of a very large clinic. Know many people in the medical profession, on a personal basis.