Dear JKS,
I think you were wise to keep your feelings to yourself & there are times, like this, that it is not easy to do. Unlicensed persons can open themselves up to an accusation of practicing medicine without a license. Some traditional medical persons are becoming slightly unhinged about the alternative healthcare movement. Perhaps it is genuine doubt due to the paucity of research studies & the ability to explain so much away with the "placebo" effect. But in some cases, it is my belief, that they see dollar bills floating away.
However, we can always bring up the subject of getting another medical opinion without over stepping boundaries.
Do not underestimate the benefit of helping your client remain positive & cheerful! That is a very important factor in healing. Hope brings many benefits with it.
The person who should feel bad is the dingbat doctor not you!
peace & joy,
holobon