It’s pretty bad practice to just read what’s on the slide. Presentations would be prepared in such a way, and known to a degree where the slides act as refreshers for the presenter with something visual to give context. There are specific cases where you can’t get away from it, but those are incredibly specific and not very common. Like, safety meetings with specific things that need to be read verbatim to every employee, and even those still need something to break it up. I can’t think of another example.