Because that's what keeps players playing.
If I wanted a game where content is only relevant the first time I'd play a singleplayer game.
I don't think you can be convinced because you actually found enjoyment in 4.3 far longer than it seemed like the typical player did.
I'm happy for you though, in Cata you had your wish where dungeon rewards were meant to help you catch up as fast as the VP cap could. And with the total of 7 runs to do so, the average player needed about 3 hours in total to cap for a WEEK.
And over a million left.
Now, as said, I don't need to worry because your ideas aren't going to return to the game. As I mentioned earlier, Blizzard will keep speeding up the catch up, but never to the degree of Cata tier skip clusterfuck that left most players doing the same 3 dungeons and one LFR a week.
If you think it's that painful to progress your character, in an MMORPG, you need to find another genre. You seek instant satisfaction, something that aren't healthy for a genre that relies on keeping players busy for long periods of time.
PS:
Originally Posted by Blizzard Entertainment
The Future of Valor
The second change I want to mention is that we plan to adjust the role of Valor points. Valor (or the various other names that the currency has had over the years) was originally added to WoW for two reasons: it helped to mitigate really bad luck, for those times when the boss just refused to drop the item you wanted, and it helped encourage players to stay with the group even if they didn't need anything off the next boss.
Over time, we have felt like Valor has taken on too prominent a role, to the point that it risks becoming more important than actual boss loot. This is particularly the case when the tier sets are available on the Valor vendors. We think killing dragons and ransacking their hoard is more epic than shopping at the magic armor store, so we want to shift back toward boss kills being the primary source of epic PvE gear.
finishing with
Originally Posted by Blizzard Entertainment
One of the pieces of feedback we heard loud and clear from Cataclysm is "I'm done raiding for the week and want to play WoW, but there is nothing to do."
Couldn't possibly be because of how fast they made catch-ups and rep acquisition
edit: damn the blizzquotes sure fucks up a lot