Over that one single season? Perhaps. It is plausible he had enough chances to impact the game defensively to be worth that much, and that production can't be taken away from him. It happened, it helped his team win, period. However, it does not mean he is a 5+ WAR talent going forward since a lot of that value is based purely on the luck of his defensive chances.
That "chance based" portion of defensive metrics, along with the fact that defensive contributions can't add indefinitely, are my 2 biggest gripes with defensive metrics. I'm hoping the availability of more statcast data will enable us to boil down defensive skill to a more basic level: Who gets the best jumps? Who takes the most efficient routes? Who covers the most ground? Who makes the most accurate throws? Who gets the ball to its destination the quickest?
And you know just as well as I do that me predicting 0-1 wins for Kemp, and him posting a 2 month WAR value that extrapolates out to 1.2 wins over a full season means absolutely nothing and doesn't make me wrong. The only reason you are nitpicking to that level is because you want to have a point, no matter how small, to post against me.
You caught me.