If I'm going to make a film where I want to make people think... stir up emotion and create a conflict inside people... because I want them to feel the mix of emotions then it's almost certainly going to be on a subject that will stimulate those emotions..
Violence, tragedy, abuse, taboo, injustice, prejudice etc
You can discuss these things to be goady,, to seek attention / publicity, or to be thought provoking - possibly more than one of those motives.
I remember a documentary called Shoah (about the holocaust) which was considered highly controversial using footage obtained not long after the war etc). Today, it stands as one of the most harrowing and moving documentaries I've ever seen.
I do worry that the price of our freedom is that some upstart producer can make a controversial drama just to get his name on the map. That is the price we have to pay in order for another producer to make a masterpiece documentary on a terrible subject.