Sure, but for someone who has already /survived/, it's worth knowing the value of those antibodies. And it's worth knowing that governments should not attack those survivors further for "not getting vaccinated" when they already have antibodies.

Worth noting that I'm not anti-vaccine but there's not enough focus on natural immunity. And I'm not encouraging people to forego vaccines and to go lick doorhandles

No, there is no survivorship bias apparent here. The samples appear to be representative of the populations they were investigating. They were looking at the risk of infection. Dead people don’t get infected, so they were not part of the populations studied.

1) possibly, but in Israel nearly all deaths are over 60 but most infections are not so maybe not so much 2) depends on the question: if you ask if you should get vaccinated or get covid, then yes. If you ask whether it’s as safe to be around a recovered as a vaccinated, then not really

That was also my first thought.