There's a difference between critical thought and reason. Alcohol clouds reason, cannabis does not.
Have you ever read the history of the Middle Eastern cult commonly known as the assassins? There is strong evidence to suggest that ingestion of the concentrated resin from indica strains impaired their ability to reason.
Alcohol clouds reason, cannabis does not.
I'm not interested in an argument debating the merits / demerits of alcohol vs. weed.
I believe that both substances should be legal for adults to use medicinally or for recreation.
If I ever find myself in a location where I can do so legally, I will partake of some fine, pure sativa strains and enjoy the enhancement they provide.