Should weed be legalized?

well, I watch this youtube video and they were talking about how weed should be legalized. Well when you look at cigarettes, alcohol, and chew. Why does the goverment legalize weed or marijuana I mean its not that much different from the other drugs. Weed also can't be addictive physically but your mind wants it so it is a pyschology addictive not physically addictive like ciggarettes and alcohol. I don't think meth, heroine, , PCP, LSD, and inhalants should be legal personally also alcohol. I think weed is probably a legitmate drug that should be legalized with tobacco and alcohol on the market. I don't know what do you guys think?