It is extremely hard to put a presentation together from scratch on a completely new subject and make it interesting. Come to think of it, most (maybe even every) good presentation you see, hear, read is a repeat: it has been given hundreds of time before.
Not necessarily with these slides, or in this format though. The startup founder starts building the story of his company the moment he puts the first line of code down. The CEO of that Fortune 500 giant has been selling cars since she joined the company 25 years ago, now she is selling the whole company to investors. The job applicant is pressing play on the story he kept on telling himself when he left his job to study an MBA 2 years ago.
Repeating makes you get better at the telling the story, learning from the verbal and non-verbal reaction of anyone you told it to. A good story is hardly ever born overnight.