Unlike no child left behind, the reality is a hunter can be left behind. The less one practices, the less one achieves the purpose of archery -accuracy.
It's not only practicing known distances; it's practicing unknown distances. And sometimes the deer won't stay around while you use a rangefinder.

I remember years ago at a 3D event. I was watching a very good form archery shooter, shoot his practices at the fixed ranges. He was accurate and he had his sights set for the right fixed distances.
Then I watched him move to the first 3D target, a standing bear.
He aimed at the chest target; the arrow struck the bear -right in the nose.

Practice, practice, practice. They give failing grades to archers.