The problem is weak, cheap and ineffective products not the herbs themselves.
Herbs have been used for healing and rebuilding health years before western medicine produced a pharmaceutical for every symptom possible creating more symptoms to cover with more medicines.
Alot of alternative products are bunk, their needs to be some govering body that makes every manufacturer produce them to a certain standard. Ive had better healing naturally than i have from my useless western doctors for 5 years who were just prescribing anti-biotic after anti-biotic for the smallest things.
Alot of pharmaceuticals are also derived from herbs.