i don't understand this cannabis-is-safer-than-alcohol myth. for example, i know people that have an extremely low mental tolerance for cannabis while functioning completely normal on a bottle of beer a day. also, i think that it is fairly well known that cannabis has a worrying correlation with schizophrenia [0]
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7442038/