Well, I beg to differ.
I attended a 4 day class last month at the Oaksterdam University in Oakland CA, along with Horticulture 101 and advanced Horticulture 102.

The instructor told the class that by the time he harvests his crop, there is not much trimming left to do, because the closer to the chopping date, he is trimming the large leaves so that the buds get all the light they deserve. The plants don't need much in the way of nutrients six weeks into flowering. He also defended his position by saying a lot of people growing orchards etc, do the same thing and they are doing it for the same reason. There were 5 or 6 instructors walking around there at the time, and no one argued with him. I think anyone who has a chance should go and take a course like I did. I have grown for seven years and learned a lot!

keylime