What does draw strength have to do with not having an computed sight for hitting a moving target with a top-down shot, or the lack if rifling to keep an arrow from tumbling when gravity slows it down at the top of the required ballistic curve? Or the scarcity of ammunition? These are issues if technology, not of training or exercise.
Who needs sights or rifling? Just like any professional athlete, thousands and thousands of practice shots (eg, 10,000 hours) to develop muscle memory is all it takes to become proficient.*
