That's because most places have a really low test-positivity rate, and on top of that it's not fatal to anywhere between 99.4% to 99.8%+ of people, with the majority of that 0.2%-0.6% being the elderly with comorbidities. So even overlooking the issues with not having fulfilled koch's postulates, the issues with testing etc - it's still incredibly unlikely for you to encounter it and even unlikelier yet for you to have a severe outcome.

In my area, test positivity rates are at like 0.8%. So 99.2% of people being tested here are testing negative.

I have elderly family who supposedly had it, it was a mild cough for a couple days for them. But there's just no way to have any confidence in the testing, seeing as how they did NOT properly isolate the virus fulfilling Koch's postulates, and the PCR testing is not fit for purpose, with them using too many cycles amplifying random fragments. Hell even the WHO admitted a positive PCR test does NOT mean you're sick or contagious.