And delta is so transmissible that herd immunity is no longer achievable even with 100% vaccinated.
For the most part, and if you're healthy. Unfortunately in a hospital you're working with people that are vulnerable.
Why is this such a controversial thing anyways? In the past we've made vaccines mandatory.
And the line drawn isn't even an arbitrary number, but an arbitrary policy with an assumed improvement.
An improvement that we know isn't good enough to prevent spread in populations with near 100% vaccination rates.
It doesn't need to be 100% effective at stopping spread to be an excellent idea.
There is ample evidence that suggests the exact opposite[1].