It seems to be a trend these days, you ever read the comments on some videos? Or a guy sets a deadlift record and ten people comment about Eddie Hall pulling 500kg, or something something Larry Wheels. Social media is a magnet for idiots.
At the very least you want the sternum tilted upwards. A big arch will reduce ROM which means less strain on the shoulders overall, but it’s hard to argue that it’s for health purposes.