Hussar
Legend
Well, the thing is, you realize the Iron Golem has elements of Sci-fi?
It can basically be considered a robot.
But, and this is the issue, would you be happy if the Iron Golem entry in the monster manual was renamed "Combat Droid"?
There's a reason they're called Warforged and not Robot, even though, essentially, they are exactly the same thing.
Naming is very important. Heck, look at all the hoopla about portmanteaus in 4e. People care about the names. The names are a big window into the feel of the game. Renaming "Wand of Light" to "Flashlight" or "Maglight" would not sit well with most gamers.
Psionics is an SF trope. Not that the ideas can't be ported into fantasy, they certainly can. But, when they are, the name has to change as well. Even the Weird Tales type pulp fiction didn't present mental powers as science. The Karnaki stories of William Hope Hodgson (great stories btw) are less fantasy and more SF/Horror. His Tsar Wars series (it's a rename) is very strongly SF, even though the science is totally bogus.