It's funny because all it has ever done for me is the opposite. I'm a pretty energetic dude and weed has always made me want to get out and move, go and play a pickup game or something. It has also brought a different type of focus on any activity I'm doing.
I see a lot of pretty silly takes in this thread that weed automatically makes you happy with boredom somehow, and that apparently leads to a bunch of people sitting on couches zoned out who would have otherwise, with that "bored" time, gone out and learned juggling. Sounds like some grandma's opinion from the 40s.