God did not make those things.
Legalizing MJ would give us "organic" MJ.
God did not make the MJ they are selling today, just the same as God did not make miniature Dobermans and all the other breeds.
The people that eat organic food are few, the market is miniscule compared to non-organic, one does not legalize MJ because like 1% will be organic.
You are wanting to legalize something which is destructive to society, it is already bad enough (like 60% of Americans are on some kind of a mind altering substance). Catholics who promote MJ for recreational use should be an oxymoron.