Nathan,
No, a shooting test will not prevent lousy shots.
It prevents people who like to get real close to their prey from bowhunting, because they can not shoot accurately at the required distances.
What if you want to limit your shots to 15 yards,because you're a killer at that distance, but they require you to shoot accurately at for example 30 yards? This is much harder to do with traditional equipment, than with sights and gizmos from the compound crowd.
Will it enhance bowhunting? Probably not.
Personally, at a roe deer, I would not shoot beyond 15 yards, because the kill area is small.
The key is education, but education has nothing to do with being proficient with a weapon at certain distances.
Example: Your son is real good to shoot a roe deer size kill at 13 yards. You plan to set him up where he has a shot around 10 yards. But he can't pass the shooting proficieny test at 25 yards you have to tell him: no bowhunting for you! Why would you exclude him from bowhunting at his effective range by law?