No one ever died from pornography or gambling but both have damaging consequences to the primary consumer and third parties in families and households.
The consequences of easy alcohol is probably many times worse to the first and third parties, when viewed over the volume of a nation of consumers.
Marijuana has its own particular damaging effects, distinct from alcohol, and it will likely never be consumed as widely as alcohol, but like alcohol, it has NO positive effects which merit its societal and legal acceptance, as its negative effects are so extensive.
By the way, pot CAN cause death by secondary effect (automobile crashes, small children consumption???) as does alcohol.
We've tried banning alcohol and marijuana, and learned that these bans also had damaging effects: enrichment of criminals, removal of the substance from effective regulation (such as age limits), and all the ills that flowed from those.
Yeah, when I get stoned I can’t wait to consume a small child! /s