Couldn't find much technical info addressing the health effects related to vaping flower. Found some that almost get there but stop short, like the following article.
Once believed to be a safer alternative to smoking, vaping cannabis has been linked to lung injury. It may even be more dangerous than smoking pot.
www.verywellhealth.com
Maybe technical authors that want to be employed know better than to say anything positive about weed. Can't prove it, and there are no guarantees in life, but it's obvious to me. I consider vaping herb a lot "healthier" than smoking herb or using oil pens. I don't know much about dabbing.
Edit: Off topic but this causes me to wonder how many regular oil pen users frequent this site. I assumed we're all flower abusers.