As I see it, Communication is key, and once you manage to convey your point, the rest isn't actually necessary, but still should be followed.
Saying "my name is ned hello how ar you im fine" conveys the same message as "Hello, my name is Ned. How are you? I'm fine." but looks a lot prettier and people take you more seriously. This simple addition of Capitals, Spelling, Syntax, and Punctuation takes maybe another ten seconds, and isn't at all necessary to say what you want to say, but makes all the difference in the world.