Developers, developers, developers, developers. They know they make games. Probably. They might think they’re making films, though, judging by the amount of fake cinematography in them. One difference between actual cinematography and game cinematography is that filming in real life captures an action taking place outside of the cameraman, thus is a presentation medium.
Video games on the other hand are drawn and programmed, thus when you find yourself watching a lengthily cinema sequence, you can’t help but feel those who designed it are enjoying a spot of autofellatio. That is to say, they care far more about their work than they do about whether or not other people particularly want to see it. See, however good the map and graphics are, they are compliments to gameplay, not the gameplay itself. People don’t boot up video games for a passive experience, they do it for an active experience. The result is that however excellent the cinema, a large proportion of us will skip it.