As a learner, I want to be able to retake a course to achieve a better score. If the percent required to pass is only set to 50% and I get a 60%, I do not have the ability to retry to get a better score.
This is problematic for our customers. Some organizations may not care about achieving a good score, they value expediency. While other organizations may place a high value on accuracy. With the current system, we cannot allow for both. But by allowing users to retake courses, we could set the overall pass rate lower and allow individual organizations to communicate their own standards.