I have been sucked in many times over by the urban myth, and probably will let my guard down and be sucked in again. It just needs all the myth busting we can muster.
Ah! the old Myths again. Like saying gear down and locked on a fixed gear plane just because one fine day you will be flying a retract and need the practice at saying gear down 3 greens. Or. Open the cowl flaps on final approach just in case you have to go around and you might overheat the engine.. Or Mixture to rich on final just in case you have to go-around and cause detonation. Or. Never do a dead cut check before run up in case you bugger the engine. Or worse still, do a dead cut check during flight before landing in case one mag is crook and you need both mags OK in case of a go-around.