Yes, but everything was more difficult to get in classic and TBC.
And don't get me wrong again. I preferred the MoP way over any other way. I think in Cata, that they should have only sold flying to 85 chars. I'm simply contesting the "they're restricting it now, so it means all of Blizzard/majority doesn't like it" by saying "they had to like the idea to implement it to begin with and then preserve it for multiple expansions.".
In the end, I'll stick with thinking them designing content for ground mounts should be the way they go, with flying only being sold at level cap. Not before (unless maybe you leveled at least 3 chars to 100, as an example), and not after, by making up some arbitrarily wall/restriction.