The thing that's causing issues is that many people who are objecting to the Covid vaccines are largely not anti-vax in general, and their reasons aren't really rooted in the philosophy of religious law around vaccines, but the aggressive and sudden push for these particular ones is tripping all of their mental alarms, because aggressive and sudden intrusions by untrustworthy governments are often used to accomplish evil that is extremely contrary to their religious beliefs. A court probably isn't going to be sympathetic to that argument, but I think it's what's happening.