put the Dodgers up 1-0... with a game lead you give Roberts the opportunity to play with his pitching, maybe even give Kershaw and extra day rest for a game 5. If Buehler can throw a good game, you really set it up so that starting pitchers can combine to close out the series if you can get to 3 games quickly.
The Dodgers really were behind the ball when they went down 2-0 in the NCLS, because every game after that had to rely on starting pitchers to carry the weight.
I think the Dodgers are one of the few teams this year that can play full games with 7-8 bull pen guys. I can think of at least three games when he did just that when Buehler was down with the blister.