society - we - do let people do dangerous things, but society can decide where that danger becomes more than just danger to an individual and manifests itself in any number of society-unacceptable ways.
i can’t have a nuclear weapon even though i want one. if i got drunk or high and in my altered state decided that it would’be fun to detonate it, the pro-drug people would say the pot had nothing to do’with it and to prosecute me the same way they’d prosecute anyone who nukes his neighbors.
now replace nuke with driving my car stoned and killing others, or playing around with a weapon while stoned and killing or injuring someone. they want to ignore pot’s - or any other mind-altering, inhibition lowering, conscience-affecting drug, contribution to that person doing that act in the first place.
Well, society decided in this case to allow people to do this.
Yes, there are risk involved in its usage. I can’t argue with that.
And DUI laws and wrongful death laws and manslaughter laws still remain and haven’t been changed in any way.