And why not if you have the space?
I guess if you only land on runways it doesn't matter - if you are so worried about an engine failure on approach, you might as well auto it all the way down every time.
But on an unprepared landing site?
At 60kts you have zero chance of seeing or avoiding a wire or other obstacle that pops into view on short final. And a big flare, close to the ground at the end of every approach? No thanks.
Come in slow, controlled, with a loaded disc. An engine failure on approach should be quite manageable, a tail- or wire strike certainly isn't. Just look at the statistics, which is more likely to happen?