My sister has gotten pretty offended when I expressed concern/reservations about her 19 yr old son using cannabis, she says, to help him relax and sleep due to his adhd.
My first reservation was the due to seeing a few articles recently aboit cannabis use, even casual, affecting the brain, in particular developing brains.
Second was due to the risk of dependence (and increased use) over time.
I didn't say at the time (because it got v heated quite quickly) but also concerned about him driving and working (manual job with a big safety emphasis... apprentice electrician).
And also possible testing by employers.
Sister gave the impression it was every night, my Mum has since said its not, but I don't know if she's just saying that because it caused a "lively" debate.