Because, honestly, it's just easier.
Like, who needs actual content when you can just copy-paste from Wikipedia?
1. Laziness - It's just faster to open up PowerPoint and start clicking "insert picture" than actually doing research.
2. Boredom - Who needs creativity when you can just regurgitate the same old bullet points over and over?
3. Fear of Actual Design Skills - PowerPoint is like, "Hey, you can make it look good, even if it doesn't make sense!"
4. The Siren Song of "Standardized Templates" - Who needs original thought when you can just use the same tired, boring layout as everyone else?
And so, here's to you, PowerPoint. May you forever reign as the King of the meeting room.