Less harmful is still only relevant before a certain threshold. Weed also gets you high, unlike an herbal cigarette. I smoke cigarettes and joints, im smoking both at once rn cause i'm in flavor country. But there is a major major difference between 'if youre gonna smoke something weed is better than tabacco' and 'it's okay to smoke some stuff' and then two are often conflate or exaggerated by potheads, of which I am one but I will also totally smoke Crack if offered as well