In patch 4.3, Blizzard introduced the Looking for Raid tool to World of Warcraft. Blizzard’s goal with this feature is to make raiding more accessible to the masses. Many players have had great success with LFR despite the criticisms. I don’t care for the tool.
First off, the elephant in the room: yes, LFR is aimed at casual players. That’s not a bad thing, nor does it mean that LFR is casual per se. The top guilds in WoW, like DREAM Paragon, used LFR to gear their raid team up. If it’s good enough for the casual players, good enough for the hardcore players, then it’s good enough for everyone in between.