At risk of appearing a bit pointy, and it’s not my intention, it’s because the stylist thought it might allow it to look different from the herd and differentiate it from other bikes in the range and their competitors bikes.
Now we’re notoriously conservative as motorcyclists and don’t like change much. Nevertheless there will be those that like it, those that are not bothered and those fr whom it’s a deal breaker. There’s plenty of alternatives.