If you look at it like another scouting tool or technique then yes,its totally fair. If you look at all the advances in bow hunting gear today,you could probally have this argument over many gadgets and bow refinements. For example,Range Finders, Release aids,scent eliminating clothes,Fast Compound bows that are quiet and compact, climbing treestands,synthetic scents,motion decoys ect ect ect........
None of the hunters just 15 years ago had any of these,and now alot of us can't imagine doing without at least one of these items.