When a baby learns to walk, it doesn't hurry. It doesn't critique itself. It doesn't compare itself to the neighbor baby. It isn't rushed by the parents. It finds its own way, day by day, sometimes doing less than yesterday, but always finding the finished product in a few weeks. Because it's allowed to find its own way, it learns. The butterfly emerging from the cocoon cannot be rushed, or it will perish.
How can the importance of going at one's own pace be different for any other topic?
As we support this in adult-learn-to-swim, it never, ever fails.
Instructors often believe that they have to hurry their students along.
They are concerned about students getting their money's worth.
They may be concerned about what the supervisor will think about class progress.
Perhaps he/she feels rushed to finish this class so another one can begin.
And every learner can learn, organically.