Protesting that ‘bad’ grammar should not hold someone back will not stop it from doing so. Accuracy is in everyone’s interest
I say tomahto and you say tomayto. My wife says dahrling and I say my dear. We all speak differently, and some of us speak different. Does it really matter?
Things matter if people think they do. I remember being with a group of Manchester businessmen whose bitterest complaint was that London stole their brightest young people and carried them off south. And not just that. As the young migrated south, they dropped their regional accents to conform to what London called “standard” English. When they came home they sounded like foreigners.