What you are saying is basically this:
If an engine fails, AND a mistake is made (like not following the engine failure contingency procedure), then the difference between having had the gear extended might get you into trouble.
Contingencies are not limited to a loss of thrust on one engine. Think about the recent mishap of a Quantas A380 at Singapore, or the famous ditching of an A320 in the Hudson river. In the latter case, when the plane hit a flock of geese, a couple of 100 ft might have made the difference between being able to reach a runway or having to ditch.
You're just being stubborn.