I think you’re misunderstanding. Yes, it cannot fit in when it’s angled properly to fit into the hole. However, if you angle the plate 45 degrees and lift one end of the plate, it will fall into the diagonally. That’s why manholes are round shaped. There is no angle for a round cover to fall into the hole itself.
Taylor Swift. She started out as a country singer, completely changed her genre, and became a pop sensation.
Edit: Nevermind, her first album was in 2005 I think.