I won't argue that you can shoot a deer without being concerned with scent... Hell I have had deer come out to an open field and stare at me less then 20 yards from me... Hell I had one this year watch me put my deer hunting stand up!!!

However I hunt to have the opportunity to take large/mature deer, especially bucks... These are deer that in theory have gained knowledge through their lives... Now having said that I am sure there will be people year-in and year-out who get big deer without being concerned with scent/wind, but they are the exception to the rule.