I like to think i'm a pretty motivated person, and I smoke weed everyday. I lift weights with a passion and I have a 430 lb. bench press. My job is a security guard at a hotel that caters parties, and my business is investment in mobile homes.
I think the motivation issue is up to the individual.
Whoa, benching 430lbs! Jeez! That's pretty hardcore. Keep up the good lifting!
As for the weed, it needs to get legalized. It's not the best thing in the world for you, but neither is drinking or smoking cigarettes or even using your cell phone. The nanny state needs to stop. If people can use something responsibily it should not be the role of the government to intervene.