This has been an extremely common tactic for a while. When they can't attack something head on because it's either politically impossible, or because it would actually be illegal, they got at it side ways.

Prior to Roe v Wade getting over turned we saw this all over certain states. They couldn't actually "ban" abortion since it was constitutionally protected, but they could make access nearly impossible. Now it seems like a similar approach is going to be taken with vaccines.