To start, this is not a "raider v.s. casual" flame war. I just want to point out some things.
I posted this after getting some replies in another thread (about removing 1 feature in WoW). Having been on both sides of this coin, I feel the need to share my views on the subject.
Point is, there are some heroic raiders who do raid that much, some during progression (I.E. Paragon, Method, Blood Legion) who stop after they're done, and some who are bad and still do it (I applaud them for effort, if not for their success). There are some that do not raid that much, hell half that amount, and are still very well progressed (My old guild, as mentioned in the example). On the same spectrum, there are guilds, such as the one I am currently in with RL friends, who raid casually and progress in normals and eventually heroics.
Same with certain titles (Very few "Delver of the Vaults" on my server), among other things (Heroic weapon/armor models having different colors, etc). Besides, who cares if they can get it now; I got my T12H back when it was current content and still use it for transmog. Does it lessen my achievement? Not in the slightest. It's old content no one cares about anyways.
My previous guild raids 3 days a week, 3 hours a night and is top 50 for US 25 (and among the best in the world for their time/efficiency bracket). If that isn't "skill," it's certainly something.
On the flip side of this coin, there are the "casual" (I loath the term, but must use it since many will be confused otherwise) playerbase. They don't raid, but they progress their character individually (Be it with LFR/crafted gear, the Auction house, transmog, soloing things, pet battles, etc). In essence, they are just as "hardcore" at their given path as a heroic raider is at theirs; I know people who do pet battles all day, and are very good at them (I.E. the "heroic raider" of pet battles).
Really, these generalizations disgust me. One does not need to raid or zerg challenge modes for 24 hours a day, 7 days a week to get realm or world first. A player with LFR or crafted gear in no way diminishes your heroic gear, title, and mount (even if they got it an expansion late).
Just tell me your thoughts on this subject.