I agree that films must be able to reflect the true reality of life with all the horrors that may contain, although ensuring films are properly classified.
There has been great progress in making films that show the nitty gritty of life, especially in the war film domain. Now those interested can see those films doing the opposite of glorifying war in the past and now showing bodies being blown apart and the horrific aftereffects for those that survive.
Hopefully, no matter what they do about on screen warnings, this must continue. Then the realities of such "life and death" may, just may, make the young potential warriors aware of the facts. That also applies to drug related films as much as war fodder.
I have always believed that if the young in 1914 had known the true carnage they were entering they would not have joyfully gone off on a jolly to fight the Hun. But films of that have only really shown the true realities in modern times - "Saving Private Ryan", "1917", "Stalingrad", and "The Somme" etc I am sure you all know of many others - have only come about in the last 20 years.
As for hospital and general medical documentary, which I love, anyone who watches them must surely know whats coming?
None of it should be toned down out of a fear of "frightening the viewing public". Bring it all on!