They never said that, anywhere. Even Blizzard’s stated reason for removing the mount from the vendors says nothing about for whom the mount was designed. They only say they don’t want to see AH mounts become as common as repair mounts.
Forgive me for assuming that because every other gold-sink mount can be saved up for over multiple expansions, I could save up for this one, too.
No. I play at my own pace, not yours or Blizzard’s. If I can’t continue to play my way, I simply won’t continue to play.