Canna industry vet here. Usually weed is not prescribed for smoking. Where it is, that’s unhealthy to the point that it casts doubt on the validity of the treatment plan. However this was not the case 20 years ago, as even during that short time knowledge about the urgency of smoking-related health outcomes has propagated much more widely. At that time it was judged by many doctors that on balance the smoking delivery method was agreeable in lieu of a better option - but now we have mulyiole. Thus, smoking as a prescribed delivery method would cast significant doubt over the validity of any treatment plan designed today. Most people just smoke what they’re given of their own accord.