Dave, I think your local homoeopath is being a bit melodramatic because a very famous homoeopathic doctor, Dr Ramakrishnan has developed a non-classical protocol for treating cancer, which might be similar to what she is using - and the Soc Hom doesn't mind that.
In my opinion, these remedies can help in a crisis situation such as swiftly developing terminal illness, when the similimum cannot be found. They can buy time.
They are no substitute for finding the similimum though, in due course, and it is essential to keep careful notes of the original symptoms so that that can be discovered.
But if you think about how the "non-indicated" remedies are working, if they are not given on homoeopathic indications then it is a type of suppression or at best, partial cure. It is second best to Hahnemannian homoeopathy which is a coherent and 100% rational way to achieve a genuine cure.
It hinges on "This classical Homoeopath said that she used techniques that were not classical i.e. Hahnemannian because they worked"...which depends on her definition of "worked".