Yes, but that doesn't mean someone will feel it more. You can recognise how tragic and awful something is without feeling it or without feeling it in the way might with something else or even the same thing presented in the different way.
Indeed. A novel can make you sad even though it's only ink on paper.
The music analogy I have taken over the dialogue of Tarkovsky's Stalker. The writer observed that music has absolutely no relation with anything real but it can move us deeply.
Well, the saddest he's seen. In time, that'll almost certainly change simply because he will. It's the same for all of us.
Not only because I will change but also because I will watch other stuff and someday, something will top it.
My ranking of saddest films is partially as follows:
1 - PMMM the movie parts 1 & 2
2 - GofT, Bicycle Thieves, Tokyo Story, Ikiru
3 - The Elephant Man, Schindler's List, Late Spring
4 - Paths of Glory, The Pianist, Plague Dogs
I should also note that I read on reviews and several different people commented in the internet that they never ever cried in any other work of fiction before they watched PMMM. It's indeed very powerful stuff since it is fundamentally a film about suicidal depression and clinging on the last possibilities for hope amidst a world of despair. It's a true tragedy film that tortures psychologically innocent little girls for nearly 4 hours and is an astonishingly cruel work of fiction. It's similar to GofT in intensity but instead of lasting 90 minutes it last 240 minutes.
While it's possible that I may find Shoah to be even sadder, I still think PMMM would remain forever one of the saddest works of fiction I ever experienced.