Having an accent I agree is nothing to do with correct or incorrect pronunciation. I assume you're referring to RP (or Received Pronunciation, often called BBC pronunciation, which used to be considered 'correct')
As long as the listeners of a speaker can understand what's being said, there is no such thing as 'correct' pronunciation. It's old hat nowadays to make assumptions about a person on the basis of their speech/accent/use of words (dialect)
I've heard Adele criticised for her broad Essex accent, and it does make me cross.
I studied Phonetics at Uni and revelled in the many recordings we studied of different accents. It never occurred to me to put them in order of social acceptability.
Language and speech are simply ways of communicating, and if that goal is achieved all is well.