Problem with the control of the thrust of the lunar module

This video shows that it makes no sense that the astronaut would have taken the control of the thrust with the handcontroller when the lunar module was flying over the lunar surface, for this control is too difficult to be left to the astronaut.
Link to the technical manual of the lunar module (which describes the systems of the lunar module, and in particular the system of propulsion):
http://www.hq.nasa.gov/alsj/LM10HandbookVol1.pdf