Your quote is referring to is the changes that DnD went though to keep up with modern DnD style videogames _like_ BG. Rather than saying those video games did not have a strong narrative impact, its saying DnD lost its own; As the DnD rules became more complex often the priorities of a party shifted to min-maxing over questing for the sake of it.

Recently there has been a change in the core DnD rules away from heavy beardy / min-maxing play back to a DM running a narrative campaign.