We are well past that. It's not that hard to say:

1) If you have natural immunity already, great! Provide evidence of your positive test

2) If you don't have evidence that you've been SARS-COV-19 positive, go get a shot so you don't have a severe hospitalization.

3) No, we don't suggest getting infected on purpose over the shot. Go read #2

Instead, the US federal government is being purposefully ignorant of how effective natural immunity is.