[Individualist]

More study is always needed for any given substance that we introduce into the envorment/human body. But due to its federal classification it is very hard to do. The major drawback of marijuana ignoring the effect on the lungs is the hit to the reward center if the brain. But the same can be said about any shortcut to a reward. Especially when you consider the potency increase of marijuana since the 70s. The root problem here as with smoking is that humans are goal driven and if they cannot achieve and do, they will find a way to simulate that feeling.

Also the main medical use of marijuana is via CBD not THC which is the high you feel. For myself it relieves my hand tremors and reduces axiety with no high, which I take as a tincture droplet. https://en.m.wikipedia.org/wiki/Cannabidiol