Because he’s 35, and most 35 year old outfielders whose best assets are speed and defense, tend to decline as they get older. Are you really hating on a guy who won an ALCS MVP and made some of the greatest catches we’ve ever seen in center field? Alright then.
Rafaela is only 23, and hitting bottom of the order and is an outstanding defender in center, benching him right now does absolutely nothing to help his plate discipline or make him better in the long run.
He has all 5 tools, and if he puts it all together the sky is the limit. If he doesn’t? We have a gold glove center fielder who bats near bottom of the order and comes up with timely hits quite often. He is nowhere near the biggest issue on the team, nor should they bench him.