I think the point is that you may wish to fly ,say 5-10nm to an airport or flat ground and then set up an auto ...in which case you will have to be able to maintain speed and height . In a single i would find a nice place and auto but in my 109 i would fly to an airport or big empty road and do a running landing . ( If you had a passenger you could get them to slowly wind throttles off as you start to touch down ...maybe only if they were a pilot ..! )