Some virologists are of the opinion that as many as 95% of the population have innate immunity to the whole family of Corona viruses.
Please don't believe everything you read -- especially when it validates your beliefs.
If 95% of the population is immune to corona viruses, then we could not have had a SARS-CoV-2 pandemic, and people would not be getting sick from other corona viruses such as 229E, NL63, OC43, and HKU1. At 95% immunity, transmission from one person to another is very unlikely.