All the ills referred to about alcohol result from the abuse of it. Moderate use of it has been proven to be beneficial to health. Saying that does not obviate the seriousness of the abuse of it.
Even moderate use of Pot over a long period will cause serious health and mental problems.
I understand that, Paul. (I'm not a teetotaler, but I do think that the human race has demonstrated its incapacity to handle alcohol.) The "moderate" part of that consumption would be what the doctor prescribed to us.
Now that is an interesting question. How many who try/use pot do not go on to other drugs ? Any reliable stats on that ?