If there was even a 0.001% chance of you dying from smoking weed, then we would know about it because people would be dying by the thousands from weed just in this country. But in reality, there are no reports of anybody dying as a direct result of cannabis that are not heavily contested in the medical community. And even if these very few claims of cannabis-related deaths are true, then statistically it still isn't any more dangerous than tap water (which also kills a very tiny minority of people who consume it).