Legalization makes things safer.

Hemp/cannabis has many active cannabinoids, just not THC. The strains common in previous generations had a lot less THC than some of today's varieties and more CBD. CBD, or cannabidiol, is not psychoactive and blocks THC's psychoactive effects to some extent, making it a safer and more enjoyable experience. CBD is a highly effective treatment for many serious medical conditions, including pain, spasms, seizures, gastrointestinal conditions, neuro-degenerative diseases, an antioxidant and an anti-inflammatory. CBD has more medicinal utility than THC, though THC is good as an appetite stimulate and anti-depressant. Because that's where the high has always been said to reside, the lust for THC as the simplistic golden egg of the plant has ended up in its corruption. In fact the increase in THC has resulted in a decrease in CBD. CBD needs to be restored in cannabis, it makes it safer and the experience better according to the old-timers.

This is one reason it needs to be legalized. I was told recently that legalization might empower the criminals and make it cheaper on the street. My argument to that would be the experience of alcohol. But just for argument's sake, if it did get cheaper on the streets, it would be less interesting to criminals who are usually interested in quick, big scores.