Slight exaggeration here. I have several older family members who have not had COVID yet. They wear masks in grocery stores and don't go to movie theaters anymore, but they live in the suburbs are several notches from living in a cabin in the woods.
I know people who never had symptoms, but tested because a household member had tested positive (with symptoms) and found out they were positive too - it happens.
In my opinion, that is the best case scenario - you got it, didn't know it and your body fought it off like a champ.
Definitely true. But there are some people who have been very careful and/or tested multiple times with every illness in the last 4 years, and who are fairly certain they have not had COVID.