SR 71....no mate,they didnt do anything unreasonable.....they only flew into a mountain.....I dont believe this
whether they were in Nav or Hdg mode,does not negate the fact that they were responsible for the safe conduct of that flight .....VMC or IMC...
There have been many CFIT incidents,did those crews do anything unreasonable?....this was not your normal daily AIRNZ excursion.......if your intent is not to blame the crew.....they surely then, must be held responsible for at least some of the outcome.