Why do people have to be so ignorant and not open their eyes and learn the truth about marijuana?

Marijuana is virtually harmless. It doesn’t kill brain cells, it doesn’t cause lung cancer, and there has never been a death caused by marijuana. It’s not addictive, and not a gateway drug. Hemp has so many uses for textiles and products, and cannabis has so many medical uses. Organized crime is only around because of prohibition. I would go into much more detail explaining these things but don’t have room to write everything I want. So I’m just wondering why most people believe all the government propaganda and don’t bother to do some real research.