I often read news about Chinese mining accidents with a large number of deaths, sometimes more than once per year. I never understood why, until I watched The 33 (Blu-ray release 2016-2-16) about the 2010 Chile mining accident, in which 33 miners were trapped in a mine for 69 days. To summarize, mining is inherently dangerous because of cave-ins (and other dangers). It is made worse by some companies who have far less care about safety than profits. To make things much worse, rescue is usually nearly impossible due to technical and geological difficulties, and a lot of money is required. In this particular accident, political concerns are also involved.
Reportedly the movie is accurate (by dramatized movie standard), with all families of the 33 being interviewed for the preparation of this movie. Even a fantasy hallucination scene is rooted in some real state of mind. Although I appreciate the reality of the movie in the same way that watching a documentary enriches my knowledge, the reality also limits the entertainment value of it. We witness the miners starving, losing it, and arguing, as well as the family breaking into tears, but these cannot be called entertaining. Now I understand why entertaining disaster movies always have nonsense plots and physics defying sequences.