Observation

Often fics are tonally-opposite to canon, because they’re written to compensate—if the original story is a comedy, sometimes people want to explore the more dramatic possibilities of the characters and setting; if the original is a high-stakes drama where a lot of the cast die, then fandom writes a lot of fix-its and sweet, fluffy AUs where nobody's life is in danger in the first place.

All of which is to say, there's a lot of fluffy fics for Les Miserables.