There is a StoryMode. If you want to see the story then play SM. An even if i have seen everything a thausand times i have the patience to wait. But if there is someone playing a HM FP and wants to see everything then i feel free to anoy him with different ways to mention that there is a spacebar to push. =)
You shouldn't assume that Story Mode implies that's the only place to expect to see story in a story-driven game. An FP possible to run solo is not a reason to expect everyone to spacebar. The story is present in HM as well, and in a lot of cases participation is required to advance the instance.