Herbs have proven to be effective but can't be depended on because of several limits such as inability to help in times of emergencies unlike ready made drugs available for use, it doesn't have a required dosage, the knowledge of herbs is not saturated to sustain the whole world.
Like you have said, integrating both modern and herbal will provide a upper hand to combat diseases.
Yes, none of modern medicine or herbs can exist in isolation.
Thanks for your thoughtful response.
You're welcome