Why do people think dry cat food is better for cats?

I told my coworker today that Im switching my cat to canned cat food and she responded by telling me that shes always heard dry was better. When I asked her from who, she couldnt tell me. Like Ive read tons of literature on why canned is better, but I havent come across any literature stating dry is better. Is there any out there? Why do so many people believe it is better?