I feel it does sound viable! I am on Ambien, not that I take it everyday, but I do take it. My insomnia issue isn't around falling asleep, it's staying asleep. Hence, not taking it daily, but when I begin a stretch of not sleeping through the night.

One night, I did wake up in the middle of an Ambien induced sleep. (I like to write down my dreams, when they are vivid), so I reached out, in the dark, for the closest thing I could find to write something down. What I wrote was, "He BLEW it, Chasing the Shark"
I also like to do self dream analysis, big fan of Freud. My ego went in search of id, and guess whose repressed memories and everything else in there came unblocked?

So, yes, to me, it stands to reason that if, you haven't been sleeping through the night and reaching REM, then by getting the necessary sleep your brain needs...your dreams are vivid and your brain may being working overtime to make up for all that lost REM.

Did you analyze yours?