"'I've seen enough lives of people close to me destroyed by marijuana" Unless by that you mean arrested for a victimless crimes and their life ruined by the state.
And for your view, while politicians down the much more damaging drug of alcohol, the drug that was the focus of an earlier failed attempt at prohibition, for your wish to restrict the personal behaviour of others we have to suffer the drug gangs, the violence that goes hand in gloves with any attempt to make such things illegal.
We all have to suffer the fallout from this failed prohibition, and in Mexico they suffer the violent gangs grown rich on prohibition, killing and maiming thousands, while they buy their politicians.
And here even more insidiously the politicians are bought by corporations who profit from the incarceration for 1 in 100 Americans, grown fat on the misery and suffering and slavery of the majority of those who are in prison for either trivial or totally victimless crimes. Crime as a for profit Industry,an industry that engages in massive lobbying to make more and more laws, an industry that actively lobbies to prevent any discussion of this, even when more than half of the American people think this should be legal. This is an abomination.
So please Jake Weisz, do not spoon-feed us your ersatz moral outrage. The job of the State is not to nanny it's citizens and lock them away for their own good for what they chose to put into their own bodies, no matter how foolish that is.
If you think some drugs are bad then encourage advertising and education against them and rehabilition from them, this could be done for the a fraction of the budget currently spent on this phoney way that is being fought only for profit and the misguided moral view of a minority.
I am far more righteously morally upset by the situation as it stand Jake, and with far more reason.