Telephoto lenses do indeed have a place in landscape photography. I used a 400mmL lens to isolate Mt. Whitney (elevation 14,494 feet) as a 94.4% waning gibbous moon set at sunrise this past February while co-instructing Gary Hart's Death Valley Workshop. Isolating portions of a scene is certainly a viable way of directing your viewer's eye and is the reason I use telephotos regularly while in the field.
Canon 1DsMKIII, 400mmL @f/11, 1/80th sec., 100 ISO, Singh-Ray Neutral Polarizer, Lexar Digital Media