Personally I use both CBD and THC based products. I love CBD salves for everything to do with the skin and for cancer patients I recommend Rick Simpson’s oil, which is heavily laden with THC. Eating organic marijuana buds does not get one high no matter how much THC is in it and is an excellent form of intake for broad based healing.
THC is not without its side-effects, especially when used over the long term, which can be measured in decades. However compared to opioids medical marijuana, when used aggressively for pain relief is as safe as apple pie. And compared to the toxicity of regular chemotherapy it is as safe as safe can be.