Why take a thing that’s been known for thousands of years to be perfectly safe, when you can take this thing invented in a lab and tested on mice for 10?
Old medicine and medical treatments were absolutely lethal compared to what we have in modern times.
(Apart from that, I surely go to a hospital if I am really sick, but for everything light, I rather find something else, than some drug, where I don't know if it is helping me, or the doctors pension fund)
But thankfully, humanity moves on, and among other innovations, came up with such things as statistical methods and drug testing. But if you so desire, you're absolutely free to distrust modern western medicine — after all, a lot of prominent people do, for example, late Steve Jobs.