There is certainly something to be said for the notion that if it’s wet then you should just go at a slower speed, and it is certainly worth noting that going back further, to races like Spain 1996 or Australia 1989 the race continued while those unable to cope spun off. It led to some surprise results, and also allowed a good driver to really shine. Having said that, there is a difference between a really wet race and monsoon conditions, which we saw in Malaysia. The fact is that these cars aquaplane very easily if there is enough standing water, and I dare say that the race would have been stopped 10 years ago.
On the other hand, I do feel that if the race is stopped, then there should be one lap behind the safety car on the restart then the cars should be allowed to go. If the safety car is out for so long everyone is ready to change onto Intermediates, then there is something wrong there, but that’s a different matter.
So to answer your question, I think the red flag was the right call in Malaysia because the cars would have aquaplaned off otherwise. Although I do see your point, and I think we all have things we would like to see change.