BB/9 is definitely a great stat to start off in order to rate control and command, but you have to look at his other peripherals and batted ball stats. For instance his 2021 HR/FB % & HR% are 14.4% and 1.35 while his career are around 10% and 1. Also his BABIP is way low compared with his career —238 vs 290, reason why his OPS against (600) is below his career (653)
It doesn't matter how you slice it, he is still a very good pitcher, no doubt.