You underestimate the tricks online marketers use to source positive reviews. I guess Apple just cannot be bothered to game them since their success is not dependent on their contents.

One example is the classic dark (or at least grey) pattern many mobile app use: Showing a popup with a question whether you enjoy the app or not. If you don't then you are asked to send private "feedback" by email. If you do then you are encouraged to leave a public (likely positive) review and redirected straight to the app store.