There are even so called yoga instructors who promotes the use of "cannabis yoga" nowadays, see for example
https://www.theganjayoga.com/
I'm not an expert on the subject but I do think there is a difference between a typical heavy potsmoker who smokes 5 grams a day and someone who use only a tiny bit of it for medicinal purposes etc. I'm not promoting it though. Especially not smoking THC heavy weed in order to feel high everyday. CBD is something else.
Hollywood does promote THC weedsmoking through so called "stoner movies" which portrays HEAVY THC weedsmoking as something harmless, very cozy etc. and you can nowadays see many people having a really naive view of this lifestyle. "It's a plant" etc. Well so is the opium and tobacco flower.
The fact is that the effects of weedsmoking stays in for a long time and it effects your ability to concentrate, getting started with things etc. not just during the "high" but also in your daily life. Yogi Bajhan who introduced kundalini yoga to the west was a clear opponent of weedsmoking, claiming it to harm spiritirual growth, which I think is true, especially if you are a heavy smoker.
He also said some very interesting things about why people want to drug themselves; experience hunting is one reason, but also that they feel handicapped without their drug, and that they want to take drugs when they are at the peak of their mood. At the peak of the mood they want to make it extra nice by having a beer etc. It's like trying to overclock a newly bought graphics card so that it eventually breaks down instead of just enjoying the new graphics card. If it ain't broke don't try to fix it!
However I do understand why people feel stressed out in todays society and thus have an urge for drugging themselves so that they can calm down. I myself have always felt it very difficult to calm down my mind. But just as Gopi Krishna said one time: meditation is concentration - which demands discipline. And it doesn't exactly become easier to concentrate when smoking a lot of weed.
By the way, anyone here know anything about the connection between Shiva and cannabis?