Right understanding has to illuminate every single part of the practice of Vipassana.
The Buddha called it sammā-diṭṭhi. In Pāli, diṭṭhi literally meant a view, or a philosophy. Then as now, there were many different kinds of philosophies in currency. But sammā-diṭṭhi,
right understanding, has nothing to do any philosophy or intellectual
position. Even with great devotion, an absolute and total conviction in
every single word of the Buddha, will not liberate anybody. It merely
becomes a belief-system like any other, and so it becomes a trap. The
Buddha carefully used the word sammā meaning “right”, and sammā-diṭṭhi only becomes sammā when it is practiced. This is the critical difference, and this is what purifies the individual: the practice.