SPDB,
If your game dictates an approach to # 5 with a low, duck hook, I can understand the difficulties you face.
But, for most golfers, it depends upon their ability to understand what they're confronted with, their course management skills and their ability to successfully execute the intended/prefered shot.
Some are able to perceive and solve the problem, others are simply not capable of discerning, analyzing, deciding and executing the proper shot.
With today's equipment, and the ability to gain higher trajectories, canted greens would seem to have a diminished effectiveness.
I would also suspect that the areas immediately around most greens benefit from excessive water dispersed through less then state of the art irrigation systems, which also diminishes their effectiveness.
Work on a high draw, aim a little further right, take a little less club, and get your left thumb on top of the shaft and I think you'll see the light.
In my limited experience, I've noticed that most good to very good amateur golfers invariably listen to lower handicap players when it comes to learning about how to play a given shot, or hole.
It's very rare when you find a PGA Tour player, scratch or very low handicap golfer seeking playing advice from a 5, 10, 20 or 36 handicap player, but, you could be on to something