Non precision approaches are always tricky in marginal weather. Even if you do it perfectly right you have a longer visual segment in which you must have at least the approach lights in sight. Unfortunately that's not always enough to align with the runway at very low altitude and desorientation in the poor visibility is real factor in my opinion. And pilots usually work like this: runway in sight (or kind of) = LAND! Sometimes experience is needed to call a go around in such cases...
Please note that I'm not saying the crew wasn't experienced. Let's wait for the accident report.
RIP