That's a pretty big claim. Alcohol's harm to major organs like the liver is pretty well known. What kind of harm does THC/CBD cause when consumed orally?
Gummies put a cognitive burden. If you are smoking that puts a fair burden on the cardiovascular system. High dose THC run a risk of psychosis.
Look im not pro either I'm however not in this lala land of believing there isn't any negative effects of THC especially over time.