I think that Gold Gloves for pitchers are:
a) a little silly
b) for most of the history of the award based on not much more than reading chicken entrails
Does anyone who's thought about this for more than eight second really believe that Greg Maddux and Jim Kaat were actually the very best fielding pitchers in the league for 15 or 17 or whatever straight years? That they never had an off year, and all that time legitimately beat out the other 50 or 100 starting pitchers in the league? That's as absurd as someone leading the league in homers for 17 straight years, or in putouts at shortstop, or in OPS for 17 straight years. Nobody, not Ruth, not Aaron, not Mays, not Mantle, not Trout... none of them did anything like that.
So, devalue? It's almost a made-up award anyway.
Anyone want to guess John Means' career high in fielding chances in a season? 100? 50? Nope, 15. Means was responsible for five putouts and 10 assists in 155 innings in 2019. Or one chance per 10 innings, give or take. Mark Reynolds, even in the midst of his Legally Blind phase, never fielded fewer than twice that number of balls per game.
Now... Cano did field 3.1 chances per nine innings last year, and has never made an error. He was involved in 25 successful plays in the field in 2023. But I still think he has essentially no chance at a Gold Glove. But I guess weirder things have happened.
What he'd be up against is first nobody really has a good idea which pitchers are great at fielding, but also that someone like Patrick Corbin of the Nats fielded twice as many balls as Cano last year because he's out there so much longer. And I'm not sure anyone is going to buy into the idea of weighting pitcher fielding chances by leverage index for relievers.