Connor McDavid is no slouch defensively and when the puck gets on his stick, there is little need for him to worry about defense. On top of this, McDavid is a playoff performer while Matthews certainly is not.
In Matthews' playoff career, he has played 50 total games and registered only 44 points. McDavid on the other hand has played 49 playoff games and has 75 points in those games. In his past two playoff runs alone, McDavid has amassed 53 playoff points in only 28 playoff games.