There is no living with it. None. There's no immunity. Only continued sickness and damage. Masking is a protection to help stop the spread and if you are not helping, you're in the way of us trying to live without it.
Our ancestors apparently lived with HCoV-OC43 after it killed a lot of people in the initial pandemic. That virus is quite similar to SARS-CoV-2 in terms of genetics and symptoms. And it's still around infecting people today. So relax, we'll (mostly) be fine.
There is immunity in the sense of "the body is able to mount an immune response due to previous exposure." Early claims of immunity to infection didn't pan out, especially post-Delta. There are benefits to having immunity, but I believe they are often overstated. (I say this as someone who is currently wearing an N95 respirator around others 100% of the time, including around my partner and family).
https://peterattiamd.com/covid-part2/
Our ancestors apparently lived with HCoV-OC43 after it killed a lot of people in the initial pandemic. That virus is quite similar to SARS-CoV-2 in terms of genetics and symptoms. And it's still around infecting people today. So relax, we'll (mostly) be fine.
https://www.slowboring.com/p/covid-1889