Without it, or getting a needle to test your blood for covid19 infection or covid19 antibodies, or a similar test, as evidence that you are a low risk traveler, what country is going to let people such as you visit without a lengthy mandatory quarantine (assuming such a quarantine is even an option they offer)?
Likewise are such willing to be banned from many businesses, services, transports, etc, locally within their own neighborhood, town, city, province, state or country?
If the blood test option is chosen, how often will it have to be repeated to keep one's status up to date?