He asked, “Why must we draw Hochma [wisdom], which is knowledge, if all of our work is in faith above reason?” He answered, “If the righteous of the generation were not in the state of knowing, the whole of Israel would not be able to work in the manner of faith above reason. Specifically when the righteous of the generation extends illumination of Hochma, his Daat [reason/knowledge] illuminates in the whole of Israel.
This is like a person. If his brain understands and knows what it wants, the organs work and do not need any brains. Rather, the hand and the leg and the rest of the organs work and do what they must.
No sensible person would consider asking or saying that if the hand and the leg had brains, their work would be better. Rather, the brain does not change the organs, for the organs are evaluated according to the greatness of the brain. This means that if the brain is a great mind, all the organs are named after it and are considered great organs.
It is likewise here: If the public adheres to a true righteous, who has already been rewarded with knowledge, the public can act in faith and will have complete satisfaction, and they do not need any knowledge.