We live in a heavily rural state which is heavily Republican, and Republicans make up almost all anti C19 vaxxers. That's not me trying to steer a narrative, that's fact.
Because we live in a heavily rural and Republican state with a large population who are against taking the vaccine, we naturally have several players coming from said demographic. One look at social media and you can tell one side from the other, especially in guys like Ike Boettger, CJ Beathard, Peter Pekar, Drake Kulick, etc.
Kirk is not going to want to piss off any one contingent of his players who don't want to get it. The last thing he wants to do, especially after last year, is start telling players what to do.
Disclaimer: I have no idea about Tyler Linderbaum's political leanings nor his vaxx status; I'm using him below as an example because he's our best player....
Example...say Tyler Linderbaum is very against taking the vaccine for whatever reason. Are you going to bench him and remove him from team activities because of it (which is illegal anyways)? No way Kirk's going to sit his best player because of something like that.