I believe the main reason you'll see a hunter in camo with a blaze orange vest is economics.
Camo gear is expensive, especially if it's winter wear, while you can buy a blaze orange cover vest and stocking cap for under $20 to comply with state safety regulations. By doing so you can use the same camo jacket & overalls for duck, deer, varmint etc. and still be nice and warm. While the camo pattern may not be perfect for each scenario it gets you by until you can add to your collection.
In other words, it could be equated to picking up a LL Bean catalog, finding their highest quality down jacket and having to buy one in each dazzling color for the weekend outing and then having the state tell you that you have to have 120 sq in of camo covering your head and upper body so you won't be shot.
Watch out for the fashion police!
MD