The arguments that something else is worse isn't a very good argument. I'll use a little hyperbole to make my point. If someone scolds a parent for letting their three year old play with a razor sharp knife the parent responds with, yes but a gun would be worse. That argument reveals they know it's bad, but to a lesser degree, which they think justifies.
PG, purely from a Biblical standpoint can you explain why God would have created cannabis and man with endocannabinoid receptors ? I'm sure there are a lot of opinions about this since people tend to believe what they want to believe from the word of God.