but I am left with the feeling that airlines are under such economic pressure that they are on the margin sometimes pushing flights thru questionable weather just to manage costs . . . is this an area where FAA/international bodies could lay out better guidelines and requirements?
You are completely wrong. No one
s about with weather just to get home and/or for costs. Whether you are in a C-152 or an airliner.
This is why I am not speculating yet on any cause.