I think its a sense of self-respect from Blizzard side about the "difficulty".
They are probably thinking in between "Yeah they will just call this stupidly easy" and "I cant butcher the fight more, its already easy!".
In other words, they cant simply put the boss without mechanics in the middle of the room for people to loot, and they dont wanna ruin the "immersion" of how the fight is too much.
And then there is Star Augur, which you can ignore literally every ability cause it cant really kill you but at the same time its obviously not tuned for "LFR raiders" since it literally requires at least 5 people pulling 500K DPS while the other DPS are barely doing 250K , and thats a good group