The inexperienced third mate may believe they have been left alone in the bridge but in many cases the captain will be observing from the window in his office.
The role of luck can’t be discounted either, if the chance of grounding is 1 in a 1000 and the 999 times the error is caught it’s a lesson learned. The 1 in a 1000 incident happens and it’s woulda coulda shoulda time