"If you're stabilised and bang on gs and loc, why not just continue?"
"If you're stabilised and bang on gs and loc, why not just continue?"
I hope this isn't from someone who fits "PP" part of PPRuNe, as it seems to indicate a basic lack of understanding of what minima are for and how they are determined!!
Just because your instruments say you are "stabilised and bang on gs and loc" it does not follow that your flight trajectory is safe to continue below DH!
DH is simply the lowest altitude that the Loc and G/S accuracy can be assured such that a missed approach can be carried out on instruments, without infringing obstacle clearance criteria.
The decision the pilot is required to make at DH is that the visual cues from the "non-instrument" world have enabled him to finish assessing the aircraft's actual position AND actual trajectory, and concluding that BOTH are satisfactory to continue to a landing. If not a go-around is mandatory.