Dear oh dear. The track taken off Ozrunways tells the story. It is obvious that that he was trying to dodge very low cloud and was often boxed in by heavy rain showers. Were there any witnesses that can verify the state of the weather. Unfortunately during my instructing career I have had countless incidences where I have have had to persuade pilots to come into the office for a cuppa while to wait for the weather to clear. The youngish ones will usually accept the offer, but the older ones frequently are less than receptive and require more convincing that the weather is crap. I have used the red button on the bowser to prevent refueling in the past when one pilot was hellbent on taking off into Overcast at 100 feet. He eventually was persuaded that a hotel for the night was the best course of action.