Cannabis and other popular psychoactive drugs (including alcohol, of course) have impact on everything from the dopamine reward system to fundamental perception.
If you take a few shots at 9 AM everyday few people will debate whether you have an alcohol misuse disorder and how problematic it is. Alcohol does it’s job - pumps your reward system and alters your perception of reality.
More and more, if you wake up at 9 AM and take a gummy, hit an incredibly high THC vape, etc it’s called medicine. While it won’t kill you and destroy your life as efficiently and ruthlessly as alcohol will I think there are fundamental issues and lasting effects from hacking dopamine rewards and using psychoactive substances to alter your reality.
The biggest difference here is how directly toxic alcohol is to the body (liver, brain, heart). Marijuana and others are substantially better from a “your body will physically give out from this” standpoint but that’s a low bar.
At one point in my life I was prescribed what I later learned to understand was an incredibly high dose of Klonopin. Drugs that bang on dopamine, GABA, etc are a sledge hammer for “life is suffering” the Buddha talked about. By the way, I‘ve met a lot of people with poly drug addiction issues and they respond to my klonopin experience with shock and amazement. FWIW it’s worth I fairly quickly realized the impact this sledge hammer hack was having on my life and quit it cold turkey. Now I know I could have died from it but I’m happy to be back to reality and process the struggle that is life with a scalpel instead of a sledge hammer.