The precedents you're invoking as fearsome are scattered over a century old, some older. Past vaccination requirements have been examined and upheld -- all without leading to an overwhelming push to eliminate general autonomy.

So the idea that "it is clear what direction it will ultimately go" is... kinda correct, actually. It is clear that general autonomy can remain a valued principle with specific exceptions. It is clear that they are the exceptions rather than the norm. And that the pull in the other direction isn't weak.