> almost every Economics presentation you see is done with Beamer; which lends itself to dense text, bullet points and equations

I don't think that has anything to do with Beamer. That's how economists present for some horrible reason. When I was on the job market about 20 years ago, the overhead projector was the only tool universally available for presentations, and I had a couple people comment that my work would be discounted by some because it was too easy to understand. That was back when I mistakenly thought the point of the presentation was to explain my research.