Dont think you need much understanding of sport to recognise distinction been made on here between Windsurfing / Sailboarding. Serenity is a Sailboard.
Besides it does NOT steer with feet.
Going in a straight line anywhere with it depends on getting CoE of Sail over centre of resitance of board. Of course "negative" footsteering affects it.Lie all boards.
Perhaps its he barge commnts that helped destroy displacement sailing in first place.