If I drive drunk, I put others at unavoidable risk. I don't smoke weed. If I do smoke weed, in what way am I causing comparable harm to others? How is it rea

If I drive drunk, I put others at unavoidable risk. I don't smoke weed. If I do smoke weed, in what way am I causing comparable harm to others? How is it reasonable to threaten me with criminal penalties? Is that good for society!?