Hmm, didn't he just said opposite?
Here is Kai Greenes(runner up Mr. Universe) take on the matter: https://www.youtube.com/watch?v=m8wZNGL4iA4 . You probably don't want to look like him, but you have to admit he knows what he's talking about.
Just google "volume vs intensity training" for a million hits on the subject.
That has nothing to do with volume training, that's just proper weightlifting in general.