You're arguing from your very specific position where apparently presentations are very rigid. I've seen 100 slide presentations that were fun and it wasn't like 75% of the slides were just cycling through pictures or something. You can use the slides to actually help tell the story rather than just using each slide as a guide post for an oral story and some visual support. Not every industry allows that kind of creativity, but many do. I imagine yours does not, which is cool, it just makes for rather dry slide shows  I guess.