Totally. It’s not impossible to harm yourself with weed/THC, especially if it’s in combination with certain other drugs or medications or interacting with certain health conditions. And some of the doses you can get now in the dispensaries I’ve also noticed are pretty massive. The synthetic cannibinoids are potentially more dangerous, having even more blood vessel constrictive properties than typical cannabinoids (can increase stroke and heart attack risks). But weed doesn’t hold a candle to the dangers and damage of perfectly legal alcohol or tobacco. And there’s plenty of other still illegal without a prescription but more dangerous drugs that are lower on the schedule list than relatively safer ones like marijuana and psychedelics (pretty much all schedule I).