Having never seen the stage version of the jukebox musical on which it was based (in its 10th year on Broadway), I still felt that I was getting a representative feel for that show, as filtered through Eastwood's flinty consciousness. But that doesn't make it a good movie.
While watching Roman Polanski's The Pianist, chances are we aren't expecting to find humor, much less to laugh. Take, for instance, the scene in which the German SS throw a disabled man out a window to his death.
We should all periodically revisit the best books and films on the Holocaust, however unpleasant, to keep our own awareness, watchfulness, and revulsion very much alive. There is no shortage of worthy choices.