Why would work not be getting done? It's just a weed stereotype. Some people are inspired or more productive after smoking.
I was a stoner for all my 20s. A toke and the hardest thing I could do was play video games and eat junk food. Meanwhile, my stoner mates would work on their side projects until deep into the night.
We're not all cut from the same cloth.
Everyone has different levels of intrinsic motivation.
At just the right level and with the right environment (and jazz fusion album) it's a shortcut to flow state and serendipitous lateral thinking, but overshoot that and you'll just be forgetting what local variables are in scope..
If something can have a positive effect it can also have a negative effect. The idea that weed is a net positive with no downsides just isn’t reality.