> Its important to note that Immunity debt is a concept that anti lockdown activists created in 2020. It was not in medical texts before that point, it never had any science behind it. It was a political term used to end mitigations against Covid not a scientific fact.

It was a term coined to allow discussion of a reasonable hypothesis that had suddenly become relevant, which was then latched onto by people who found it useful. The causality that you are claiming is backwards.