The point is that speaking a language is both a token of group membership and a method to communicate. It's hard to be a member of a group. It's much easier to learn to communicate.
Her research explores the notion that teaching native pronunciation might eliminate a significant indicator of an individual’s identity. She said, “We recognise Indian, South African, Egyptian and Chinese speakers from their accents. As long as they are intelligible and have the potential to communicate effectively there should be no reason for them not to retain their accents – something which they might like to do as this accent carries their identity, ethnicity and indicates the group of people they belong to.”"