This is a valid use of fluid aura...
...and this isn't. There's no reason to knock it away from tank if you're going to sleep it. The tank can use flash to build enmity on it so that it does not come after you when it wakes up, and the dps won't pull it when it they switch to it.
This is a viable reason not to raise someone. What I was saying in the OP is that some healers just say "f*ck u dps" from the beginning and never planned on healing them from the start.