Slide decks are created for different reasons. Some are made to fully contain and communicate ideas then widely circulated - these decks are content. These deck

Slide decks are created for different reasons. Some are made to fully contain and communicate ideas then widely circulated - these decks are content. These decks don't need someone to deliver them. Decks accompanying presentations aren't those slide decks. Presentations are expected to use human communication skills to express more than what you can fit in slides. In school, you give just these kinds of presentations. You aren't asked to create slide decks and circulate them among your colleagues. The slides are not the content. Which is why these slides in particular mostly make no sense alone.