Football is the ultimate team game. It takes all eleven players on the field to do their job correctly for a play to be successful. While this is true, having great players can help open opportunities by creating favorable matchups. The effect of great players shows up in all aspects of the game, especially on the defensive side of the ball.
None of what you just read is meant to be breaking news, and there are numerous examples of great players helping make others better throughout 49ers history. All one needs to do is look at players such as Ronnie Lott, Bryant Young, Deion Sanders, and most recently, Nick Bosa.