Mate you're delusional. The only thing "harder" about Vanilla raids were the gear checks (in part due to terrible itemization) and the logistics of running a 40 man raid. But given you'd be carrying 10-15 of them anyway, (up until Naxx anyway) the logistics were pretty similar. TBC definitely brought a challenge, but you're living under a rock if you don't think raid bosses are more complex these days. Maybe not all of them sure, but plenty are. What's changed is the fact that today we have UI's to practically play the game for us combined with step by step youtube guides.
As for raids being a "privilege" (in caps no less). Give me a break. The only thing I was "privelage" too back in those days was being a single man in his early 20's with a few part-time jobs so I could raid 7 nights a week. (Yes, we raided 7 nights a week, it was the only way to gear new raiders). Now, I'm so under pirvileged to be married with a daughter, 30 years old and an Airline Captain that I don't raid I should quit wow immediately.
Seriously, as I said, the challenge is in heroics. If you're not doing heroics then don't complain about things being too easy, and if you are, then who cares how easy the rest of the game is?
Most gamers don't play WOW for challenge, we play it to be entertained, just like we watch TV, read books and play other games (shocking i know). You want a real challenge? Try raising kids and paying a mortgage in today's economy.