Think about how vaporizing dry plant material works: you're using low, sustained heat to vaporize the oils without igniting anything. You're still inhaling a viscus substance, and there are going to be negative consequences to that. You're also going to vaporize things other substances in the plant matter that may not exist in the oil/wax forms depending on extraction method.

TL;dr- Vaping is better than smoking, but that still doesn't mean it's harmless or "good".