B -
maybe because Molinari's bunker shot on 18 on Saturday was so impressive and still fresh in my mind, I'll note something that had never occurred to me, even though it doesn't quite align with your framing/question, ie
amateurs/members might be able to play the course from c 6300 yards (instead of 7400+), but they are no less likely to occasionally find a fronting bunker (as on 18) than the pros are; but man, how exponentially more challenging they'd find the next shot (especially to a back pin) than the pros do.
Sure, the sand in fluffy and manicured etc etc, but the scale of those bunkers in relation to the size and contours (and potential pin placements) of those greens makes them 'in play' for members in so vastly a different way than they do for the pros.
P