Tobacco and fast food kill hundreds of thousands every year through diseases (cardiac disease, diabetes, lung cancer, emphysema). All car accidents kill 30,000 a year total, of these a tiny fraction involve pot. So yes, cigarettes and MacDonalds are bigger killers.
BS I smoked for 22 years and my lungs and heart are fine. I eat McDonald’s a few times a week and my cholesterol and heart and weight is good. I don’t smoke pot but in my youth when I did I felt pretty F’d up. Plus it was laced once with PCP and my girlfriend and I got paranoid and almost did some crazy stuff. POT is a drug that can make one paranoid, hallucinate, kills brain cells, slows reaction time, etc. Tell me the former two substances can do that.
Do believe you originally used the words “more dangerous”. I was not aware that cigarettes and fast food are classified as mine altering substances as are as alcohol or drugs.