Answer:
The statement is True. Understanding what is a point of view and how does it act on someone's perception is not only helpful but imperative to the study of history.
Step-by-step explanation:
A source is any material -- be it written, visual or voiced -- from a past event, the historian is studying.
Any material has a point of view. There is no source that has a complete view of the event from when and where it was produced. The same way any of us now can't give a complete explanation of what is happening right now, no source from the past can.
Thus historians use many sources in order to produce historical knowledge. Because of this, they have to learn to take into account the source's point of view to better evaluate it.