I disagree very strongly. The more data we have from cannabis research, the more we know that it is hardly 'completely harmless'. It certainly causes schizophrenia in some people, and really accelerates nearly every known mental illness. It's a drastic demotivator and contributes to poorer life outcomes in nearly every social class. Civilizationally, it ranks among the most harmful drugs. It is the one I personally want my kids doing the least, besides fetty. I'd rather they smoke crack than cannabis. If crack is a bad drug for you, you'll completely ruin your life in a few months and have a chance to bounce back. If cannabis is, you'll just slowly do nothing and eat junk food, and maybe a chubby Starbucks manager in your forties. And this kind of failure mode is exceedingly common.