My Bayesian prior has been sufficiently updated to effectively know: I don't know a single mother with a restraining order for a son who doesn't smoke too much weed. I have met a bunch of mothers and sons in my life.
In a Popperian sense we can all only assume so stop splitting hairs.
Clearly, smoking a shit ton is bad for people with marginal mental health or marginal emotional health.
Clearly, smoking a shit ton is bad for people with marginal mental health or marginal emotional health.