How I feel at least, and the jist of what others seem to be saying, is they think you SHOULD have to do work to get there. Be responsible for yourself. What happens in LFR and even "Heroics" now, and don't even pretend like you haven't noticed, is afking on bosses-dying on purpose on bosses-being waaaaaaaaaaaaaaaaaaaaaaaaaaaay less than optimal or efficient-just folling the boss and auto attacking.
The way Blizzard originally sold LFR, and the outlook I too was simple: Use LFR as a stepping stone for real raids, and to practice on a weaker version of those raids. I expected the loot to be worse than the normal versions, you know, maybe blues, but instead it was just a few points about normal gear. I expected the bosses to be easier, but most of them were tank and spank, and you could pretty much ignore many many many of the boss mechanics. At first you could tell people tried hard. You had 17 DPS, and to my experience, at first it was pretty close. After a few months though, you would notice people seemed to die on purpose. Lets not pretend like you didn't notice. Or you would look at recount and see that DK who was below tanks, hitting maybe 9k DPS when others were doing 5 times that easily. Then you check the top 3 damage abilities and 90% of it was his melee AA.
Also, you are lying to yourself if you think "They made LFR without any big cries of the casuals about not being able to raid." You can check these forums right not, and I am sure you will find many posts from those very same casuals bitching about how Blizzard only caters to the "hardcores"