Look up "CBD, Bell curve of effectiveness" and you'll see why you still want some THC. You can definitely medicate with CBD rich cannabis, which has a little THC in it, and not get high or stoned. The terpene profile has a lot to do with it as well.

The charlotte's web guys made a lot of money with a highly ineffective strain. Many people have much better results with other CBD rich strains of cannabis. Marketing and hype can go a long way in a prohibition market. ;)