no one is. i was being facetious. 
a few mission stories don’t ‘work’ - as far as i can tell - without guidance.
whether that’s intentional, a weird technical limitation or an oversight is moot - it is a frustrating experience, regardless, especially when the vast majority of mission stories in the entire trilogy do work perfectly well without guidance.
they could create additional lines of dialogue or new intel objects to ensure all mission stories work without having to have guidance on, but i imagine - in my utter laymen-ness - it would be much easier to unflag a few ancillary stages in mission stories that don’t have accompanying diegetic information available for players.
that doesn’t feel like a big ask to me, and it would help avoid frustrating dead ends on promising threads where players have no way to know how to proceed or, indeed, why they can’t. leaving that kind of experience in is the exact opposite of good game design, as far as i can tell.