I think it's because he knows the presentation in and of itself is unimportant vs the takeaways delivered, so he doesn't bother wasting time on it specifically

I think it's because he knows the presentation in and of itself is unimportant vs the takeaways delivered, so he doesn't bother wasting time on it specifically since it has low ROI given his speaking capabilities. And I suspect he dislikes acting/faking, so he wouldn't use precise scripts anyway.