Herbal medicine, to be free to use plants for medicine as we see fit as adults, and not need a permission slip from a doctor.
Homeopathic medicine is something different.
And doctors won't tell you anything on using plants because they can only prescribe things that have passed clinical trials and no one will pay billions of dollars to do that for a plant that they can't patent. In europe and elsewhere they do prescribe some plants but not here in the US.
Maybe you should learn what you are talking about before taking a position condemning it.