Another angle to this is that you'd like to fly pitch & power in the approch.
Pitch to keep the airpseed and power to keep the glide.
So a low speed problem is originating from something else than only a lack of thrust. Then to only apply a bunch of thrust as the A/T would do, would maybe bump your speed up, but will let you end up in a whole set of other troubles. I could easily see a deep landing result from this. The only correct act to save yourself from an unstabilzed situation like this is to go around and try again.