Except you're criminally underrating the number of runs that his defense saves. With the DH being adoptes, multiple competitive teams are willing to take poor offense in CF in exchange for great defense
Well, no. Remember that Robles can catch a flyball, but too often he throws to the wrong base. Furthermore, he is too-often a crazy base-runner. It looks like he has no baseball-brains. Maybe he gets too excited on the field, and maybe his problem is mostly psychological, but he does not improve. The brainlessness, and his unwillingness to be coached make Robles something of a luxury. If only Minnesota would take Robles for Michael A. Taylor!
It happens I went looking for a weak-hitting defense-first CF, but it was hard to find one like Robles. First that came to mind: Cesar Geronimo, the "good field / no hit" CF for the Reds in the 1970s. Memory told me that the Reds had such a slugging team that they could carry Geronimo. However, he was a much better hitter than I had remembered, so it was only in comparison to guys like Bobby Tolan or Bobby Bonds that Geronimo looked like a light hitter. He was decent, and was a Gold Glover for three seasons.
https://www.baseball-reference.com/players/g/geronce01.shtmlThen there is Jim Busby, who fell into the hitting hole after a couple of good seasons in 1953 and 1954. The Nats traded Busby because he was only hitting around .230 in 1955, and Busby never hit much again. He was a superb fielder, though, and he had to cover CF in Griffith Stadium. (You could put most of Nats Park inside the Griffith Stadium outfield.) Busby was never a regular again, but he outhit Robles. See
https://www.baseball-reference.com/players/b/busbyji01.shtmlNow, if a team like the Yankees wants to trade someone with potential, to trade such a guy for Robles, then that would be a win.