Look at great poets: No punctuation most of the time.

Are you serious? Are you trying to say that poetry/song lyrics SHOULD be punctuated?

It's called 'poetic licence' - there are NO 'rules' when it comes to poetry or song lyrics!

Yet punctuation isn't important, right?

'Let's eat Mum!'
'Let's eat, Mum!'

People who use CORRECT punctuation are like people who are POLITICALLY CORRECT (PC), right?

WRONG! People who use the 'rules' of punctuation are often better educated than those who follow PC 'rules'.