Different strokes for different folks.
I never liked the consummable farm (I bless the days of the 2.1 patch when Blizzard finally capped it all), but I actually LOVED the whole "slowly building up your raid". I'm a team player at heart, and once you have a core group of players you can rely on, you get this "we're all in it together" feeling and it's great to slowly progress with everyone. It's quite fun to actually craft things for your team-mate, having people gather materials in the world for others and so on.
More "solo-minded" players might feel it's a chore, but working all together for a common goal has definitely been something I really liked in Vanilla and TBC, which more or less vanished from WotLK onward.
Yeah, it seems people think that all Vanilla raiding was on the level of MC or WotLK Naxx, and as such have a pretty absurd view of Vanilla raid difficulty (and WotLK Naxx was in fact about the same difficulty as MC).Most fights in AQ40 alone would rip people to shreds if they came unprepared. Yes like you said, MC bosses to a point would be fine, but once you get to BWL and moving forward it's not nearly as simple as some people would have it be. A lot seem to be thinking of WOTLK when they talk about Naxx. Naxx40 was something else entirely.