You can't seem to wrap your mind around the obvious, can you?
Suppose you finished all the raids, got M Arch down, and had nothing more to do with raids until the next expansion. A content drought, right?
Not at all! Someone comes up to you and points out all the pet collecting, squirrel /loving, etc. you haven't done yet. No content drought, since there's all that content yet.
But, you complain, you don't want to do any of that!
"Doesn't matter," this person tells you. "It's content that you haven't done, therefore there is no content drought."
Of course that's absurd. If you don't want to do a piece of content, then, from your point of view, that content might as well not exist. It doesn't prevent you from seeing that there is, for you, a content drought.
My point is that in BC this was the case, with respect to raiding, for most players. They had no real chance to advance in raids, so either never started or quickly became blocked. Only a small minority moved beyond Kara.
If you say these people had no content drought, because T5 and T6 were there ahead of them, then I say you have no content drought, because you have pets to collect and squirrels to /love.