I think if you rephrase that to:
Your results can only be as good as your property. Then it may be a true statement. You take the best hunter and put him on a bad parcel and he may be successful but his results won't be as good as they could be elsewhere. You take a slob hunter and put him on prime property and he
MAY have great results but he is statistically going to blow the opportunity.
The bottom line is, I believe that if you took a guy that kills a mature buck off of slammer property year after year and a guy that sees a mature buck about once a decade because they are just not there and put them both on the same brand new quality property the guy from the good property has a distinct advantage. That guy has been around, seen, observed, and killed mature bucks. He KNOWS what they will do because he has seen it first hand. He doesn't have to guess. So, that is the factor that plays the most into success on any given property is the experience with mature deer.
He also has the confidence and nerve to make the shot count when he has an opportunity. Closing the deal is a HUGE part of the process as well. A lot of guys have missed some great bucks.