Yes, and gout is not unrelated to kidney function (not sure about pseudo-gout). But I imagine in his mind the vaccine might have aggravated it, or caused an immune response that did so. Which in my mind is still better than getting COVID. But clearly Didi was advised by his doctors to get the shot (he also recently stopped masking).
It's truly unfortunate the clubhouse apparently has some aggressively anti-vaccine voices as I suspect some if not most of the players who haven't done it are just apathetic or indifferent, so if a buddy in the clubhouse argues against it that only makes it easier for them to not bother. I'm sure the vaccination rate for 24-28 year-olds in general is not great, and we know it's not great in certain states (presumably including Louisiana and Nebraska, if not California).
In a game where people do all kinds of stupid stuff - including taking illegal drugs and cheating with sticky stuff and stealing signs - in order to do anything it takes to win, it is really just kind of sad and hilarious that these guys would willingly give up this competitive advantage, as well as the convenience (no masks, no contract tracing devices) that makes for a smoother season.