From my perspective, as someone with a small ribcage and long arms (fortunately, my humerus is longer than my radius and ulna), the bench press poses some risks. Someone with a barrel chest and short arms can perform the bench press in a safe range of motion, whereas if I were to consistently do a bench press with bar to chest, my elbows would actually be lower than my back - that would not be good for my shoulders. I generally do my presses with the inside of my elbow no lower than my back, but the bar doesn't touch my chest. I'm not entirely certain what the advantage is of using a board over other options. I would think doing the press inside a squat rack with pins at the lowest height you want the bar to go would make more sense, and would be safer. Alternately doing a floor press instead, with the boards (if necessary) under the plates would also make more sense to me.