In World War II, Merchant Marine Academy cadets were sent into U-boat waters on working ships as part of their training, and 142 died before graduating, while Naval Academy midshipmen trained in the sheltered Chesapeake Bay. The episode argues the double standard, gives the counter-case its full weight, and leaves open whether it was prudence or privilege.
Sources disagree on the merchant fleet's death toll, which is reported as more than 9,000, roughly 1 in 26. Whether the difference in training was designed by class is probably unanswerable, and whether O'Hara merits the Medal of Honor is advocacy, not a decision.