While it's in OK county, it's not really "in town", it's a very different part of the city. It's in Green Pastures if you're familiar with it, no very populated and a very very impoverished area. This buck could easily have just been running 40 acres or so and crossing gravel roads that literally no one ever drives down. Biggest threat it would have faced is all of the wild dogs.
I googled the area after you posted the location, and it looks pretty uninhabited. It wouldn't surprise me if there wasn't more trophy bucks in the area.