On the losing end are those great minds that actually are involved in passionate causes.
Not to minimize Cousteau at all, but his work is certainly no more important to the future of the planet than the subject Michael Moore is tackling here.
There is NO comparison between him and Cousteau. Cousteau was a scientist, who educated us about the environment with FACTS as you say. I have always admired him greatly, and I don't like the comparison at ALL.
And again, no one has tried to compare the two, including the news article posted above by Simon. You can be sure that the people judging Cannes didn't have cause to think "hey, this'll be like back when Cousteau won it!", they simply voted on this years group of films, and this film came out on top. A long time ago, there was an entry from Cousteau one year, and it came out on top. End of comparison.
As for the catagory it falls in, for the life of me I can't see how people completely outside the film industry can develop such intense passion for the catagorization process of films, but anywhooo... if you hadn't noticed, there are alot of gorgeous nature programs being made, and w/o question the genre was pioneered and popularized by Cousteau's work, but damn few of that sort of thing will attract anyone to a theatre anymore.
If I ever get to make a film about the WaterTower Backhoe and Tractor Society, should I expect great lamentations from the ex-JW community if the film does well in the documentary catagory? Cuz I assure you, I would not be un-biased in my presentation. I would look for the absolute worst, most heartbreaking stories to tell. I would dig thru the publications, and video of talks being given, and secret videos of judicial meetings, to find the ugliest, most hurtful things JW's acting in an official capacity have ever said on or off the record. I would be totally honest, but Jehovahs Witnesses will not see it as honest, and in fact some non-witness people who just-don't-know, would assume that I have been dishonest as well, due to my bias.