There are blue posts that justify that the reason why certain events aren't shown in game is because Blizz believes that the gamplay is more important than the lore. Therefore, implementing the events in the game, for lore's sake, would mess with the gameplay. However, one of the many things that make videogames such a unique medium is that gameplay is the lore. The way characters act, react, and pretty much all the action establishes progression and characterization. Why bother having books, comics, other mediums that deeply affect the lore instead of just containing them as asides or isolated events that help characterize individuals? Why not focus on the gameplay first and have the lore spring from the encounter design instead of treating them as separate things?